Seal Island Weather Forecast

    • 47
    • 53

    Increasing Clouds

    • 53
    • 60

    Partly Sunny

    • 46
    • 62

    Slight Chance Rain Showers

    • 45
    • 55

    Mostly Sunny

    • 45
    • 52

    Mostly Cloudy

    • 45
    • 52

    Mostly Cloudy

Today 18 May Knox

Partly sunny. Highs in the mid 60s. Light and variable Winds, becoming south around 10 Mph in the afternoon.

Tonight 18 May Knox

Partly cloudy. Lows in the upper 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Seal Island Temperature Statistics

May Temperature

Rockland, Knox County Regional Airport (21.7 miles)

  • Lowest 4 May, 2026

    32 °F

  • Average May

    49.2 °F

  • Highest 4 May, 2026

    63 °F

Climate (2021–Present)

Rockland, Knox County Regional Airport (21.7 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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