Updated October 2026
Dry Tortugas National Park Weather by Month
Dry Tortugas National Park is warmest in August, when the nearest NOAA climate station averages a high of 91°F and a low of 79°F, and coldest in January, with an average high of 74°F and an average low of 65°F. September is the wettest month, with about 7.2 inches of precipitation.
These figures are NOAA's 1991–2020 climate normals, the 30-year average for each calendar month, from the nearest long-record weather station, 0.1 miles from the park's reference point. A single station cannot describe a whole park: temperatures elsewhere in Dry Tortugas National Park can differ from these, particularly with elevation.
Warmest month
Aug
91°F avg high
Coldest month
Jan
65°F avg low
Wettest month
Sep
7.2 in avg
Longest days
Jun
13.5 h of daylight
Average weather at Dry Tortugas by month
| Month | Avg high | Avg low | Precipitation | Daylight |
|---|---|---|---|---|
| January | 74°F | 65°F | 2.4 in | 10.6 h |
| February | 76°F | 66°F | 1.7 in | 11.2 h |
| March | 79°F | 68°F | 2.1 in | 11.8 h |
| April | 83°F | 71°F | 2.6 in | 12.6 h |
| May | 86°F | 75°F | 2.0 in | 13.2 h |
| June | 89°F | 77°F | 4.3 in | 13.5 h |
| July | 91°F | 78°F | 2.2 in | 13.4 h |
| August | 91°F | 79°F | 4.3 in | 12.9 h |
| September | 89°F | 78°F | 7.2 in | 12.1 h |
| October | 85°F | 76°F | 4.7 in | 11.4 h |
| November | 79°F | 71°F | 1.9 in | 10.8 h |
| December | 76°F | 67°F | 2.4 in | 10.5 h |
| Year total | 37.8 in |
NOAA 1991–2020 climate normals from station USC00082418, 0.1 miles from the park's reference point. Daylight is the monthly average, computed from the park's latitude. Each month links to how crowded Dry Tortugas is at that time of year.
Dry Tortugas weather by season
Winter: December to February
Average highs hold near 75°F in all three months, with average lows near 66°F. Together the three months average 6.5 inches of precipitation, about 17% of the yearly total and less than in any other season. Daylight is at its shortest, about 10.5 hours in December.
Spring: March to May
Average highs climb from 79°F in March to 86°F in May, with average lows between 68°F and 75°F. Together the three months average 6.7 inches of precipitation, about 18% of the yearly total. Daylight lengthens from about 11.8 hours in March to 13.2 in May.
Summer: June to August
Average highs hold near 90°F in all three months, with average lows near 78°F. The average high is 90°F or hotter in July and August. Together the three months average 10.8 inches of precipitation, about 29% of the yearly total. Daylight is at its longest, about 13.5 hours in June.
Fall: September to November
Average highs fall from 89°F in September to 79°F in November, with average lows between 71°F and 78°F. Together the three months average 13.8 inches of precipitation, about 37% of the yearly total and more than in any other season. Daylight shortens from about 12.1 hours in September to 10.8 in November.
What the National Park Service says about the weather
The climate in the Dry Tortugas is subtropical, which basically means that it has warm and tropical weather in the range of 60°F to 90°F. The two main seasons are the winter stormy season from December through March which is windier and sees rougher seas, and the summertime tropical storm season from June through November where there is a higher chance of isolated storms. During the summers it is hot and humid. During the winter the temperature is milder and drier.
Weather description courtesy of the National Park Service — official park site.
Today's forecast for Dry Tortugas
Averages describe a typical month, not this week. For current conditions and the seven-day outlook, the National Weather Service issues a forecast for the park's reference point at 24.63°N, 82.87°W. It covers that one spot, so other elevations in the park can differ from it, as they do from the averages above.
National Weather Service forecast for Dry Tortugas National Park →
Weather and crowds together
August, the warmest month, sees about 1.0× the visitors of the park's average month. June is the busiest month of the year and October the quietest. To see those crowds set against the weather for all twelve months, read the best time to visit Dry Tortugas National Park. For hotels, cabins and rentals close to the park, see where to stay near Dry Tortugas.
Where to stay near Dry Tortugas
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Frequently Asked Questions
August is the warmest month at Dry Tortugas National Park, with an average high of 91°F and an average low of 79°F. That is the 1991–2020 average at the nearest long-record NOAA station, 0.1 miles from the park's reference point. Temperatures inside the park can differ, particularly with elevation.
January is the coldest month at Dry Tortugas National Park, with an average low of 65°F and an average high of 74°F, based on NOAA 1991–2020 climate normals.
September is the wettest month, with about 7.2 inches of precipitation. February is the driest, at about 1.7 inches. The station records about 37.8 inches of precipitation in an average year.
Daylight at Dry Tortugas National Park runs from about 10.5 hours a day in December to about 13.5 hours in June, computed from the park's latitude.
Weather at nearby parks
Keep exploring
Sources: NOAA NCEI U.S. Climate Normals 1991–2020 (station USC00082418), daylight computed from latitude, weather description from the National Park Service, crowd levels from National Park Service Visitor Use Statistics (1979–2025). Updated 2026-10-11. Lodging results are provided by Stay22; WhenToVisitParks may earn a commission from bookings, at no extra cost to you.