Cozumel Weather by Month

Cozumel, a beautiful Caribbean island off Mexico’s Yucatán Peninsula, enjoys a warm tropical climate throughout the year. Temperatures remain relatively high in every season, making it an attractive destination for beach vacations, snorkeling, scuba diving, and exploring the island’s natural attractions.

The island has two main seasons: a relatively dry season from November through April and a wetter season from May through October. Summer and early autumn bring higher humidity and heavier rainfall, while winter offers slightly cooler temperatures and more comfortable conditions for outdoor activities.

Sea temperatures remain warm enough for swimming throughout the year, although the Caribbean is generally warmest from July through October.

Cozumel Weather by Month

You can click the image below to view the full-size weather chart for Cozumel.

January – Warm, Sunny and Relatively Dry

Average high: 84°F (29°C)
Average low: 68°F (20°C)
Rainfall: 2.74 inches (69.7 mm)
Water temperature: 80°F (26.6°C)
Daylight: 11 hours

January is one of the most comfortable months to visit Cozumel. Daytime temperatures reach around 84°F (29°C), while nighttime temperatures drop to approximately 68°F (20°C). The warm days and relatively cool evenings create pleasant conditions for exploring the island, visiting its beaches, and enjoying outdoor activities.

Rainfall averages about 2.74 inches (69.7 mm), with approximately five rainy days throughout the month. The Caribbean Sea has an average water temperature of around 80°F (26.6°C), making it comfortable for swimming, snorkeling, and scuba diving. With 11 hours of daylight, visitors have plenty of time to enjoy the island.

Best for:

Snorkeling and scuba diving
Exploring San Miguel de Cozumel
Relaxing on beautiful Caribbean beaches
Enjoying outdoor sightseeing

February – Warm, Sunny and Dry

Average high: 86°F (30°C)
Average low: 68°F (20°C)
Rainfall: 2.39 inches (60.7 mm)
Water temperature: 80°F (26.5°C)
Daylight: 11.5 hours

February brings warm temperatures, plenty of sunshine, and relatively little rainfall to Cozumel. Average daytime temperatures reach approximately 86°F (30°C), while nighttime temperatures remain around 68°F (20°C). The comfortable weather makes this month an excellent time to explore the island and enjoy its outdoor attractions.

Rainfall averages just 2.39 inches (60.7 mm), making February one of the drier months of the year. The Caribbean Sea stays warm at approximately 80°F (26.5°C), providing excellent conditions for swimming, snorkeling, and diving. Daylight increases to 11.5 hours, giving visitors more time to enjoy the beaches and explore the island.

Best for:

Beach vacations and sunbathing
Scuba diving and snorkeling
Exploring Punta Sur Eco Beach Park
Outdoor activities and sightseeing

March – Hot, Sunny and Relatively Dry

Average high: 88°F (31°C)
Average low: 70°F (21°C)
Rainfall: 1.83 inches (46.4 mm)
Water temperature: 80°F (26.6°C)
Daylight: 12 hours

March is one of the driest and sunniest months in Cozumel. Average daytime temperatures rise to around 88°F (31°C), while nighttime temperatures remain near 70°F (21°C). The warm tropical weather is ideal for spending time outdoors, relaxing on the beach, and discovering the island’s natural beauty.

Rainfall averages only 1.83 inches (46.4 mm), making March the driest month in the provided weather data. The sea temperature averages approximately 80°F (26.6°C), offering comfortable conditions for swimming, snorkeling, and exploring the Mesoamerican Barrier Reef. With 12 hours of daylight, visitors can enjoy longer days of outdoor adventures.

Best for:

Snorkeling along the coral reefs
Scuba diving and underwater photography
Visiting Playa Palancar
Exploring beaches and coastal attractions

April – Hot, Sunny and Mostly Dry

Average high: 90°F (32°C)
Average low: 72°F (22°C)
Rainfall: 2.73 inches (69.4 mm)
Water temperature: 81°F (27°C)
Daylight: 12.5 hours

April brings hotter temperatures and longer days to Cozumel. Average daytime temperatures reach approximately 90°F (32°C), while nighttime temperatures fall to around 72°F (22°C). The warm weather is perfect for beach activities, boat excursions, and exploring the island’s beautiful coastline.

Rainfall averages about 2.73 inches (69.4 mm), with approximately three rainy days during the month. Caribbean Sea temperatures increase to around 81°F (27°C), making swimming, snorkeling, and scuba diving particularly enjoyable. With 12.5 hours of daylight, April provides plenty of time for outdoor adventures and sightseeing.

Best for:

Swimming and snorkeling
Boat tours and sailing excursions
Visiting Chankanaab Beach Adventure Park
Enjoying sunny beach days

May – Hot, Humid and Moderately Wet

Average high: 91°F (33°C)
Average low: 73°F (23°C)
Rainfall: 3.82 inches (97 mm)
Water temperature: 82°F (28°C)
Daylight: 13 hours

May marks the beginning of the wetter and more humid period in Cozumel. Average daytime temperatures reach around 91°F (33°C), while nighttime temperatures remain near 73°F (23°C). The combination of high temperatures and increasing humidity can make afternoons feel particularly hot.

Rainfall increases to approximately 3.82 inches (97 mm), with around five rainy days throughout the month. However, showers are often intermittent, leaving plenty of opportunities to enjoy outdoor activities. The Caribbean Sea warms to approximately 82°F (28°C), creating excellent swimming and snorkeling conditions. With 13 hours of daylight, visitors can still enjoy long days on the island.

Best for:

Swimming in warm Caribbean waters
Snorkeling and scuba diving
Exploring the island’s beaches
Boat excursions and water sports

June – Hot, Humid and Very Wet

Average high: 91°F (33°C)
Average low: 75°F (24°C)
Rainfall: 6.59 inches (167.4 mm)
Water temperature: 83°F (28.5°C)
Daylight: 13.5 hours

June is one of the hottest and wettest months in Cozumel. Average daytime temperatures reach approximately 91°F (33°C), while nighttime temperatures remain around 75°F (24°C). High humidity makes the weather feel warmer, especially during the afternoon.

Rainfall rises significantly to about 6.59 inches (167.4 mm), with approximately eight rainy days during the month. Showers and thunderstorms can occur, although sunny periods are still common. The Caribbean Sea averages around 83°F (28.5°C), making it very pleasant for swimming and diving. June also has the longest daylight duration of the year, at approximately 13.5 hours.

Best for:

Scuba diving and snorkeling
Swimming in warm ocean water
Exploring marine life and coral reefs
Enjoying long summer days

July – Hot, Humid and Moderately Wet

Average high: 93°F (34°C)
Average low: 75°F (24°C)
Rainfall: 3.85 inches (97.8 mm)
Water temperature: 84°F (28.8°C)
Daylight: 13 hours

July is one of the hottest months in Cozumel, with average daytime temperatures reaching approximately 93°F (34°C). Nighttime temperatures stay around 75°F (24°C), so evenings remain warm and tropical. High humidity can make outdoor activities feel more demanding, particularly during the hottest hours.

Rainfall averages about 3.85 inches (97.8 mm), with approximately eight rainy days throughout the month. Despite occasional showers, there are still plenty of opportunities to enjoy the island’s beaches and water activities. Sea temperatures reach around 84°F (28.8°C), making July an excellent month for swimming, snorkeling, and scuba diving.

Best for:

Diving and snorkeling adventures
Swimming in warm Caribbean waters
Visiting beach clubs
Boat trips and island excursions

August – Hot, Humid and Moderately Wet

Average high: 93°F (34°C)
Average low: 75°F (24°C)
Rainfall: 3.69 inches (93.7 mm)
Water temperature: 85°F (29.2°C)
Daylight: 13 hours

August remains hot and humid in Cozumel, with daytime temperatures averaging around 93°F (34°C) and nighttime temperatures near 75°F (24°C). The tropical heat is particularly noticeable during the afternoon, so visitors should stay hydrated and take breaks in shaded areas.

Rainfall averages approximately 3.69 inches (93.7 mm), with around eight rainy days. Although occasional tropical showers are possible, the month still offers plenty of opportunities for beach vacations and marine activities. The Caribbean Sea reaches approximately 85°F (29.2°C), making August one of the warmest months for swimming and snorkeling.

Best for:

Scuba diving and underwater exploration
Swimming and snorkeling
Relaxing at beach clubs
Enjoying warm tropical waters

September – Hot, Humid and Very Wet

Average high: 93°F (34°C)
Average low: 75°F (24°C)
Rainfall: 6.81 inches (172.9 mm)
Water temperature: 85°F (29.3°C)
Daylight: 12.5 hours

September is one of the wettest months in Cozumel, bringing hot temperatures, high humidity, and frequent rainfall. Average daytime temperatures reach approximately 93°F (34°C), while nighttime temperatures remain around 75°F (24°C). The combination of heat and humidity can make the weather feel particularly warm.

Rainfall increases to approximately 6.81 inches (172.9 mm), with around 13 rainy days during the month. September also falls within the Atlantic hurricane season, so visitors should monitor weather forecasts and tropical storm advisories when planning their trips. Despite the wetter conditions, sea temperatures remain very warm at approximately 85°F (29.3°C).

Best for:

Scuba diving during suitable weather conditions
Snorkeling when the sea is calm
Enjoying warm Caribbean waters
Relaxing at indoor attractions and spas

October – Hot, Humid and the Wettest Month

Average high: 90°F (32°C)
Average low: 73°F (23°C)
Rainfall: 8.67 inches (220.2 mm)
Water temperature: 84°F (29°C)
Daylight: 11.5 hours

October is the wettest month in Cozumel based on the supplied rainfall data. Average daytime temperatures reach around 90°F (32°C), while nighttime temperatures drop to approximately 73°F (23°C). Although temperatures are slightly lower than in midsummer, humidity remains high.

Rainfall averages approximately 8.67 inches (220.2 mm), with around 12 rainy days throughout the month. Heavy showers and thunderstorms are possible, and tropical storm activity remains an important consideration because October falls within the Atlantic hurricane season. The Caribbean Sea stays warm at approximately 84°F (29°C), making swimming possible whenever weather and sea conditions are suitable.

Best for:

Enjoying warm Caribbean water
Scuba diving on calm-weather days
Exploring museums and indoor attractions
Taking advantage of quieter travel periods

November – Warm, Humid and Moderately Wet

Average high: 86°F (30°C)
Average low: 72°F (22°C)
Rainfall: 5.34 inches (135.7 mm)
Water temperature: 83°F (28.1°C)
Daylight: 11 hours

November brings gradually improving weather to Cozumel as the wetter season begins to wind down. Average daytime temperatures reach approximately 86°F (30°C), while nighttime temperatures fall to around 72°F (22°C). Conditions become more comfortable for exploring the island and enjoying outdoor activities.

Rainfall decreases to about 5.34 inches (135.7 mm), with approximately eight rainy days during the month. Although showers are still possible, sunny periods become increasingly common. The Caribbean Sea maintains a warm average temperature of approximately 83°F (28.1°C), making November suitable for swimming, snorkeling, and diving. Daylight averages around 11 hours.

Best for:

Exploring Cozumel’s natural attractions
Snorkeling and scuba diving
Visiting beaches and coastal parks
Enjoying warm weather with fewer summer crowds

December – Warm, Sunny and Relatively Dry

Average high: 84°F (29°C)
Average low: 70°F (21°C)
Rainfall: 3.76 inches (95.6 mm)
Water temperature: 81°F (27.3°C)
Daylight: 11 hours

December is a pleasant month to visit Cozumel, with warm daytime temperatures and relatively comfortable evenings. Average highs reach approximately 84°F (29°C), while nighttime temperatures drop to around 70°F (21°C). The weather is generally more comfortable than during the hot and humid summer months.

Rainfall averages approximately 3.76 inches (95.6 mm), with around six rainy days throughout the month. The Caribbean Sea remains pleasantly warm at approximately 81°F (27.3°C), making it suitable for swimming, snorkeling, and scuba diving. With about 11 hours of daylight, visitors have enough time to enjoy the island’s beaches, restaurants, and outdoor attractions.

Best for:

Christmas and winter beach vacations
Snorkeling and scuba diving
Exploring San Miguel de Cozumel
Enjoying warm Caribbean sunshine

Cozumel Weather by Month: Annual Overview

Month	Avg High	Avg Low	Rainfall	Water Temp.	Daylight
January	84°F (29°C)	68°F (20°C)	2.74 in	80°F	11 hrs
February	86°F (30°C)	68°F (20°C)	2.39 in	80°F	11.5 hrs
March	88°F (31°C)	70°F (21°C)	1.83 in	80°F	12 hrs
April	90°F (32°C)	72°F (22°C)	2.73 in	81°F	12.5 hrs
May	91°F (33°C)	73°F (23°C)	3.82 in	82°F	13 hrs
June	91°F (33°C)	75°F (24°C)	6.59 in	83°F	13.5 hrs
July	93°F (34°C)	75°F (24°C)	3.85 in	84°F	13 hrs
August	93°F (34°C)	75°F (24°C)	3.69 in	85°F	13 hrs
September	93°F (34°C)	75°F (24°C)	6.81 in	85°F	12.5 hrs
October	90°F (32°C)	73°F (23°C)	8.67 in	84°F	11.5 hrs
November	86°F (30°C)	72°F (22°C)	5.34 in	83°F	11 hrs
December	84°F (29°C)	70°F (21°C)	3.76 in	81°F	11 hrs

Best Time to Visit Cozumel

The best time to visit Cozumel is generally from December through April, when rainfall is relatively low, temperatures are comfortable, and conditions are favorable for beach activities and sightseeing.

Best weather: January through April offers warm temperatures and relatively dry conditions.
Best for swimming: May through October features particularly warm Caribbean water, generally around 82–85°F.
Driest month: March, with approximately 1.83 inches (46.4 mm) of rainfall.
Wettest month: October, with approximately 8.67 inches (220.2 mm) of rainfall.
Hottest months: July through September, with average highs around 93°F (34°C).
Best for outdoor activities: February through April, when rainfall is relatively low and temperatures are pleasant.

Cozumel is a year-round tropical destination, but travelers who prefer sunshine and less rain will generally enjoy visiting during the winter and early spring months.

20 Frequently Asked Questions About Cozumel Weather

1. What is the best month to visit Cozumel?

The best months to visit Cozumel are December through April. During this period, temperatures are warm, rainfall is relatively low, and conditions are ideal for beach activities, snorkeling, scuba diving, and sightseeing.

2. What is the hottest month in Cozumel?

July, August, and September are typically the hottest months in Cozumel, with average daytime highs reaching approximately 93°F (34°C). High humidity can make temperatures feel even hotter.

3. What is the coldest month in Cozumel?

January and February are generally the coolest months. Average daytime highs are around 84–86°F (29–30°C), while nighttime temperatures can drop to approximately 68°F (20°C).

4. Does Cozumel have warm weather year-round?

Yes. Cozumel has a tropical climate with warm temperatures throughout the year. Average daytime highs generally range from 84°F to 93°F (29°C to 34°C), making it a popular destination in every season.

5. When is the rainy season in Cozumel?

The rainy season generally runs from May through October. September and October are particularly wet, with October receiving the highest average rainfall.

6. What is the driest month in Cozumel?

March is typically the driest month, with approximately 1.83 inches (46.4 mm) of rainfall and only three rainy days. It is an excellent time for outdoor activities and beach vacations.

7. What is the rainiest month in Cozumel?

October is the rainiest month, receiving approximately 8.67 inches (220.2 mm) of rainfall. September is also quite wet, with around 6.81 inches (172.9 mm).

8. Can you swim in Cozumel in January?

Yes. The Caribbean Sea averages approximately 80°F (26.6°C) in January, making swimming, snorkeling, and scuba diving comfortable for most visitors.

9. What is the water temperature in Cozumel?

Water temperatures in Cozumel remain warm throughout the year, generally ranging from approximately 80°F to 85°F (26.5°C to 29.3°C). The sea is warmest from August through September.

10. Is Cozumel too hot in the summer?

Summer in Cozumel can be hot and humid, with average daytime temperatures reaching 91–93°F (33–34°C). Visitors should stay hydrated, wear sunscreen, and plan outdoor activities during the morning or late afternoon.

11. Does Cozumel experience hurricanes?

Yes. Cozumel is located in the Caribbean and can be affected by tropical storms and hurricanes. Atlantic hurricane season runs from June 1 through November 30, with September and October generally being important months to monitor weather forecasts.

12. Is December a good time to visit Cozumel?

Yes. December is an excellent time to visit Cozumel. Average daytime temperatures reach approximately 84°F (29°C), rainfall averages 3.76 inches (95.6 mm), and the sea remains warm at around 81°F (27.3°C).

13. Is February a good month for a Cozumel vacation?

February is one of the best months for a Cozumel vacation. The weather is warm and relatively dry, with average highs of 86°F (30°C), only 2.39 inches (60.7 mm) of rainfall, and comfortable ocean temperatures.

14. How humid is Cozumel?

Cozumel generally experiences relatively high humidity because of its tropical Caribbean climate. Humidity is particularly noticeable from June through October, when temperatures are hot and rainfall is more frequent.

15. How many hours of daylight does Cozumel get?

Cozumel receives approximately 11 to 13.5 hours of daylight throughout the year. June has the longest days, with around 13.5 hours of daylight, while January and November have approximately 11 hours.

16. Is March a good time to visit Cozumel for snorkeling?

Yes. March is an excellent month for snorkeling and scuba diving because rainfall is relatively low, temperatures are warm, and the Caribbean Sea averages around 80°F (26.6°C).

17. Does it rain all day in Cozumel during the rainy season?

No. Rainy-season showers are often intermittent rather than continuous. Visitors can still experience plenty of sunshine between showers, although heavy rain and thunderstorms are possible, especially during September and October.

18. What should I pack for Cozumel?

Pack lightweight clothing, swimsuits, sandals, comfortable walking shoes, sunglasses, sunscreen, and a hat. During the rainy season, bring a lightweight rain jacket or compact umbrella. Water shoes can also be useful for exploring rocky beaches.

19. What is the best time to visit Cozumel for scuba diving?

December through April is an excellent period for scuba diving because rainfall is generally lower and weather conditions are often comfortable. However, Cozumel offers diving opportunities throughout the year, depending on sea conditions and visibility.

20. Is Cozumel worth visiting during the rainy season?

Yes. Cozumel can still be an enjoyable destination during the rainy season, particularly for travelers interested in warm ocean temperatures, snorkeling, scuba diving, and fewer crowds. However, visitors should be flexible with their plans and monitor tropical weather forecasts, especially in September and October.

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