Miami Beach sea temperature today: 32°C – beach water temperature, Miami Beach, United States
Interactive map
United States · Florida
Miami Beach
Sea
32.0°C89.6°F
Air
–
UV
–
Bathtub
Above ⁦28°C⁩

Last updated ·

Today, September 13, the sea temperature at Miami Beach is 32 °C (90 °F). That is 1.9 °C warmer than the usual 30.1 °C in September. Comfortable for swimming year-round.

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Climate · monthly averages

Sea temperature by month

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.

Warmest in August (30.6°C). Coldest in January (24.1°C). Comfortable for swimming year-round.

5-year averages (2021–2025). Min/Max are typical daily lows and highs, not record extremes.
MonthSea · MinSea · AvgSea · MaxAir · MinAir · AvgAir · Max
January23.4°C24.1°C24.6°C19.1°C20.8°C22.9°C
February23.4°C24.3°C24.9°C20.9°C22.5°C24.4°C
March24.5°C25.1°C25.5°C21.6°C23.4°C25.3°C
April25.6°C26.0°C26.4°C22.8°C24.5°C26.1°C
May27.5°C27.8°C28.3°C24.9°C26.6°C28.1°C
June28.8°C29.1°C29.3°C26.2°C27.5°C28.5°C
July29.5°C30.2°C30.8°C27.1°C28.6°C29.8°C
August30.2°C30.6°C31.0°C27.4°C28.7°C29.7°C
September29.8°C30.1°C30.3°C26.4°C27.8°C28.8°C
October28.2°C28.5°C28.7°C24.9°C26.3°C27.5°C
November26.6°C26.8°C27.2°C22.8°C24.2°C25.7°C
December25.0°C25.5°C25.8°C21.0°C22.5°C24.2°C

About Miami Beach

Miami Beach sits on a barrier island between the Atlantic Ocean and Biscayne Bay, and its calling card is the Art Deco Historic District – roughly 800 pastel buildings from the 1920s and 1930s lining Ocean Drive between 5th and 23rd Streets. South Beach claims the iconic strip with its lifeguard towers and crowds, while Mid-Beach further north runs quieter past the Faena District and Eden Roc. The sea holds 28-30 °C82-86 °F from July through September, with Miami International airport about 20 minutes by the MacArthur Causeway.

Frequently asked questions

Today, September 13, the sea at Miami Beach is 32 °C (90 °F)90 °F (32 °C) – bathtub-warm. The usual September average is 30.1 °C86 °F.

No single number works for everyone, so the scale on this page is only a guide to how the water feels: below 13 °C55 °F icy, 13–18 °C55–64 °F cold, 18–23 °C64–73 °F refreshing, 23–28 °C73–82 °F pleasantly warm and above 28 °C82 °F like a bath. Right now the sea at Miami Beach is 32 °C90 °F.

Yes – the sea at Miami Beach (Florida, United States) stays swimmable all year. January is the coolest month, averaging 24.1 °C75 °F – ideal for swimming for most people; the warmest is August at 30.6 °C87 °F.

In August, at 30.6 °C87 °F on average. The coolest month is January at 24.1 °C75 °F – still above the 18 °C64 °F swimming line, so there is no off-season for swimming.