Flat Island Weather Forecast

    • 50
    • 58

    Rain Showers

    • 56
    • 71

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 48
    • 65

    Chance Rain Showers

    • 46
    • 63

    Chance Rain Showers

    • 47
    • 63

    Chance Rain Showers

Today 25 May Coastal Waldo

Showers with isolated Thunderstorms. Patchy fog. Highs in the lower 60s. Southeast Winds around 10 Mph with Gusts up to 20 Mph in the Morning, becoming light and variable. Chance of rain near 100 percent.

Tonight 25 May Coastal Waldo

Partly cloudy in the Evening, then clearing. Lows in the lower 50s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Flat Island Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (18.6 miles)

  • Lowest 4 May, 2026

    32 °F

  • Average May

    53 °F

  • Highest 20 May, 2026

    86 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (18.6 miles)

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  • Average Low 2021–2026

    39.6 °F

  • Average 2021–2026

    47.6 °F

  • Average High 2021–2026

    54.8 °F
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