Key West weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Excellent
Best time to visit: March – July, October – December
What is the weather like in Key West in March?
In March, Key West is warm: daytime highs average 24 °C, and even at night it stays warm at around 22 °C. The sea averages 23.6 °C – pleasant for swimming. With around 9 hours of sunshine a day, there is plenty of sun. Rain is rare: about 4 days bring 26 mm in total. The air is often humid and muggy. It is often windy, with gusts of around 29 km/h. All in all, March is an excellent month for a holiday in Key West.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 80 | 91 | 99 |
| Day | 23° | 24° | 25° |
| Night | 21° | 22° | 24° |
| Sea | 23° | 24° | 25° |
| Sun | 8 h | 9 h | 10 h |
| Rain days | 4 | 4 | 5 |
More details for March
- Daylight
- 11 h 58 min07:38 – 19:36
- UV index
- 9 · very highclear sky, noon (estimate)
- Muggy days
- 17 daysdew point 18 °C or more
- Wind
- 29 km/haverage daily peak
- Cloud cover
- 33 %on average
- Hot days
- 0 days30 °C or more
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %78 %
- Seaweight 25 %94 %
- Sunshineweight 20 %100 %
- Few rainy daysweight 20 %99 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in March
- Swimwear
- Sunscreen
- Sunglasses & sun hat
- Insect repellent
- Windproof jacket
Key West in March: quick answers
Is Key West hot in March?
Warm rather than hot: in March, daytime highs in Key West average 24 °C and nights cool to about 22 °C.
Can you swim in Key West in March?
Yes. In March the sea averages 23.6 °C – pleasant for swimming.
Does it rain much in Key West in March?
Rain is rare: about 4 days bring 26 mm in total.
Key West month by month
The whole year in Key WestAll destinations: USA
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, GeoNames (CC BY 4.0)