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Sea temperature in United States in April
21°Cwarm · monthly average
The sea around United States averages 21°C in April. Refreshing — comfortable for most swimmers after a brief acclimatisation.
Monthly sea temperatures across the year
Best swim months
May, Jun, Jul, Aug, Sep, Oct, Nov
Warmest month
July (28°C)
Coolest month
January (18°C)
Best beaches in United States
Florida Atlantic
South Beach
Popular Florida Atlantic beach near Miami Beach.
Florida Atlantic
Mid Beach
Popular Florida Atlantic beach near Miami Beach.
Florida Atlantic
North Beach
Popular Florida Atlantic beach near Miami Beach.
Florida Atlantic
Haulover Beach
Popular Florida Atlantic beach near Miami Beach.
Florida Atlantic
Bal Harbour Beach
Popular Florida Atlantic beach near Bal Harbour.
Florida Atlantic
Sunny Isles Beach
Popular Florida Atlantic beach near Sunny Isles.
Florida Atlantic
Hollywood Beach
Popular Florida Atlantic beach near Hollywood.
Florida Atlantic
Hallandale Beach
Popular Florida Atlantic beach near Hallandale.
Florida Atlantic
Fort Lauderdale Beach
Popular Florida Atlantic beach near Fort Lauderdale.