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South Portland, ME Marine Weather Forecast

Station CASM1 - 8418150 - Portland, ME

July 8, 2025 12:30 pm EDT
Location: 43.656N 70.246W
Wind Direction: ESE (110°)
Wind Speed: 1.9 knots
Wind Gust: 2.9 knots
Atmospheric Pressure: 29.88 in (1011.9 mb)
Air Temperature: 74.5°F (23.6°C)
Water Temperature: 57.2°F (14.0°C)


This Afternoon - 71°F
Jul 08, 2025
5 mph E
Patchy Fog
Patchy fog and a chance of showers and thunderstorms before 4pm, then patchy fog and scattered showers and thunderstorms. Mostly cloudy, with a high near 71. East wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Tonight - 61°F
Jul 08, 2025
5 mph NE
Patchy Fog
Patchy fog and scattered showers and thunderstorms before 3am, then patchy fog and scattered showers and thunderstorms. Mostly cloudy, with a low around 61. Northeast wind around 5 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday - 66°F
Jul 09, 2025
5 mph E
Patchy Fog
Patchy fog and scattered showers and thunderstorms before 2pm. Mostly cloudy, with a high near 66. East wind around 5 mph. Chance of precipitation is 40%.
Wednesday Night - 60°F
Jul 09, 2025
0 to 5 mph E
Mostly Cloudy then Slight Chance Rain Showers
A slight chance of rain showers after 2am. Mostly cloudy, with a low around 60. East wind 0 to 5 mph.
Thursday - 65°F
Jul 10, 2025
5 to 10 mph E
Chance Rain Showers
A chance of rain showers. Cloudy, with a high near 65. East wind 5 to 10 mph. Chance of precipitation is 40%.
Thursday Night - 60°F
Jul 10, 2025
5 to 10 mph E
Chance Showers And Thunderstorms
A chance of rain showers before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers and thunderstorms. Cloudy, with a low around 60. Chance of precipitation is 40%.
Friday - 67°F
Jul 11, 2025
5 mph E
Slight Chance Rain Showers then Mostly Cloudy
A slight chance of rain showers before 8am. Mostly cloudy, with a high near 67.
Friday Night - 61°F
Jul 11, 2025
0 to 5 mph E
Mostly Cloudy
Mostly cloudy, with a low around 61.
Saturday - 70°F
Jul 12, 2025
0 to 10 mph E
Mostly Sunny
Mostly sunny, with a high near 70.
Saturday Night - 63°F
Jul 12, 2025
5 mph S
Mostly Cloudy
Mostly cloudy, with a low around 63.
Sunday - 69°F
Jul 13, 2025
5 to 10 mph S
Partly Sunny
Partly sunny, with a high near 69.
Sunday Night - 64°F
Jul 13, 2025
5 to 10 mph S
Slight Chance Rain Showers
A slight chance of rain showers after 8pm. Mostly cloudy, with a low around 64.
Monday - 71°F
Jul 14, 2025
5 to 10 mph S
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 71.
Monday Night - 64°F
Jul 14, 2025
5 to 10 mph S
Slight Chance Rain Showers
A slight chance of rain showers before 2am. Partly cloudy, with a low around 64.

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