Biscayne National Park, located just south of Miami, Florida, is known for its turquoise waters, coral reefs, mangrove forests, and warm subtropical climate. Because over 95% of the park is water, weather plays a major role in determining the best time for boating, snorkeling, diving, and wildlife viewing. Understanding Biscayne National Park weather by month can help you plan the perfect visit.
Below is a month-by-month breakdown of temperatures, rainfall, and seasonal conditions.
Biscayne National Park Weather by Month
| Month | Avg High | Avg Low | Weather Highlights |
|---|---|---|---|
| January | 75°F (24°C) | 60°F (16°C) | Mild, dry, pleasant winter weather |
| February | 76°F (24°C) | 62°F (17°C) | Comfortable, breezy, low humidity |
| March | 78°F (26°C) | 65°F (18°C) | Warm, great for boating & snorkeling |
| April | 82°F (28°C) | 68°F (20°C) | Warm, occasional rain showers |
| May | 86°F (30°C) | 73°F (23°C) | Hot, humid, wet season begins |
| June | 89°F (32°C) | 76°F (24°C) | Hot, frequent thunderstorms |
| July | 91°F (33°C) | 77°F (25°C) | Very hot, humid, daily rain |
| August | 91°F (33°C) | 77°F (25°C) | Peak heat, heavy rain, hurricane risk |
| September | 89°F (32°C) | 76°F (24°C) | Stormy, highest hurricane activity |
| October | 85°F (29°C) | 72°F (22°C) | Cooler, drier, improving conditions |
| November | 80°F (27°C) | 67°F (19°C) | Mild, dry, ideal outdoor weather |
| December | 77°F (25°C) | 63°F (17°C) | Pleasant, dry, popular travel month |
Biscayne National Park Weather in January
- Average High: 75°F (24°C)
- Average Low: 60°F (16°C)
- Rainfall: Low
January is one of the most pleasant months to visit Biscayne National Park. Cooler temperatures, low humidity, and minimal rainfall make it ideal for kayaking, hiking on the mainland areas, and boat tours. Water visibility is usually good, though the ocean can be cooler for swimming.
Biscayne National Park Weather in February
- Average High: 76°F (24°C)
- Average Low: 62°F (17°C)
- Rainfall: Low
February continues the dry-season trend. Winds may be slightly stronger, which can affect boating conditions, but overall the weather is comfortable and stable. This is a popular month for snorkeling and wildlife viewing, especially for migratory birds.
Biscayne National Park Weather in March
- Average High: 78°F (26°C)
- Average Low: 65°F (18°C)
- Rainfall: Low to moderate
March marks the transition toward warmer weather. The water temperature begins to rise, making snorkeling more enjoyable. Crowds increase during spring break, but weather conditions remain excellent for most outdoor activities.
Biscayne National Park Weather in April
- Average High: 82°F (28°C)
- Average Low: 68°F (20°C)
- Rainfall: Moderate
April brings warmer days and slightly higher humidity. Rain showers become more frequent but are usually brief. This is still a great time to visit before the intense summer heat and hurricane season begin.
Biscayne National Park Weather in May
- Average High: 86°F (30°C)
- Average Low: 73°F (23°C)
- Rainfall: Increasing
May signals the start of the wet season. Temperatures rise noticeably, and afternoon thunderstorms become more common. Despite this, mornings are often sunny and calm, making early-day boating and snorkeling ideal.
Biscayne National Park Weather in June
- Average High: 89°F (32°C)
- Average Low: 76°F (24°C)
- Rainfall: High
June is hot and humid, with frequent rain showers and thunderstorms. Hurricane season officially begins this month, although major storms are still relatively uncommon. Water temperatures are warm, which is great for swimming and diving if weather conditions allow.
Biscayne National Park Weather in July
- Average High: 91°F (33°C)
- Average Low: 77°F (25°C)
- Rainfall: High
July is one of the hottest months in Biscayne National Park. Expect high humidity, strong sun, and regular afternoon storms. Fewer visitors come during this time, so it’s quieter, but heat and insects can be challenging.
Biscayne National Park Weather in August
- Average High: 91°F (33°C)
- Average Low: 77°F (25°C)
- Rainfall: Very high
August is peak wet season and the height of hurricane risk. Heavy rain, high humidity, and hot temperatures dominate. While marine life is abundant and water temperatures are perfect for snorkeling, weather disruptions are common.
Biscayne National Park Weather in September
- Average High: 89°F (32°C)
- Average Low: 76°F (24°C)
- Rainfall: Very high
September is statistically the most active month for hurricanes. Rainfall is heavy, and storms can develop quickly. This is the least popular time to visit, but travelers who monitor forecasts carefully may find lower crowds and off-season pricing.
Biscayne National Park Weather in October
- Average High: 85°F (29°C)
- Average Low: 72°F (22°C)
- Rainfall: Decreasing
October marks the transition back to drier conditions. Temperatures become more comfortable, humidity drops, and hurricane risk gradually declines. This is a good shoulder-season month for boating and snorkeling.
Biscayne National Park Weather in November
- Average High: 80°F (27°C)
- Average Low: 67°F (19°C)
- Rainfall: Low
November is an excellent time to visit Biscayne National Park. Cooler air, calm waters, and low rainfall create ideal conditions for outdoor exploration. Wildlife activity increases, and crowds remain moderate.
Biscayne National Park Weather in December
- Average High: 77°F (25°C)
- Average Low: 63°F (17°C)
- Rainfall: Low
December offers mild temperatures and dry weather, making it one of the most popular months. Boating conditions are usually favorable, though occasional cold fronts can bring cooler water and breezy days.
Best Time to Visit Biscayne National Park
- Best Weather: December through April
- Best for Snorkeling & Diving: March through August (weather permitting)
- Fewer Crowds: May, October, and November
- Lowest Prices: August and September (with weather risks)
Biscayne National Park Weather FAQs
- What is the best month to visit Biscayne National Park?
The best months to visit are from December to April, when the weather is dry, mild, and comfortable. - What is the coldest month in Biscayne National Park?
January is typically the coldest month, with average lows around 60°F (16°C). - What is the hottest month in Biscayne National Park?
July and August are the hottest months, with highs around 91°F (33°C) and high humidity. - Does Biscayne National Park have a rainy season?
Yes, the rainy season usually runs from May through October, with frequent afternoon thunderstorms. - What months have the least rainfall in Biscayne National Park?
December, January, and February typically have the lowest rainfall. - Is Biscayne National Park humid year-round?
Humidity is highest in summer but much lower during the winter and early spring months. - When is hurricane season in Biscayne National Park?
Hurricane season lasts from June 1 to November 30, with peak activity in August and September. - Is it safe to visit Biscayne National Park during hurricane season?
Yes, but visitors should monitor forecasts closely and remain flexible with travel plans. - What is the best month for snorkeling in Biscayne National Park?
March through August offers warm water and good visibility, weather permitting. - What is the water temperature in Biscayne National Park by month?
Water temperatures range from about 70°F (21°C) in winter to 85°F (29°C) in summer. - Can you swim in Biscayne National Park in winter?
Yes, but winter water temperatures may feel cool without a wetsuit. - Which month has the calmest seas in Biscayne National Park?
April and May often have calmer seas, ideal for boating and kayaking. - Does Biscayne National Park get cold at night?
Winter nights can feel cool, but temperatures rarely drop below 55°F (13°C). - What should I pack for Biscayne National Park in summer?
Light clothing, sun protection, rain gear, insect repellent, and plenty of water. - What should I pack for Biscayne National Park in winter?
Light layers, a windbreaker, sunscreen, and comfortable outdoor clothing. - Is Biscayne National Park crowded year-round?
The busiest months are December through March, while summer is much quieter. - Does rain usually last all day in Biscayne National Park?
No, rain is often brief and occurs as afternoon thunderstorms. - What month has the best visibility for diving?
Late winter to early spring typically offers the clearest water. - Is summer a good time for wildlife viewing in Biscayne National Park?
Yes, marine life is abundant in summer despite the heat and rain. - What month is best for budget travelers visiting Biscayne National Park?
August and September often have lower prices, though weather risks are higher.
Final Thoughts
Understanding Biscayne National Park weather by month helps visitors plan activities around Florida’s distinct dry and wet seasons. For the most comfortable experience, the winter and early spring months are ideal. However, adventurous travelers who can handle heat and rain may enjoy the park’s quieter summer months and warm waters.