Portland Water Temperature

(Today) 2024

13.3°C / 55.9°F

The water will feel cool (fresh). Probably too cold for all but seasoned swimmers. We'd recommend a 4mm or 5mm wetsuit if you want to stay in the water.

Current weather

16°C / 62°F
(broken clouds)
Partly cloudy
Wind
7 mph
Humidity
82%

The measurements for the water temperature in Portland, Maine are provided by the daily satellite readings provided by the NOAA. The temperatures given are the sea surface temperature (SST) which is most relevant to recreational users.

Water temp by month

Monthly average max / min water temperatures

The graph below shows the range of monthly Portland water temperature derived from many years of historical sea surface temperature data.

Portland average maximum / minimum water temperatures
Maximum and minimum monthly sea temperatures in Portland
  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Min °C 3.3 2.2 1.8 3.3 5 9.8 14.3 16.3 14 9.7 8 5.2
Max °C 6.5 5.1 4.7 7 10.7 15.4 19 19.4 18.2 15.9 11.2 9.3
Min °F 39.2 37.1 36.4 39.4 43.2 51.9 59.6 62.5 58.9 51.9 47.7 43
Max °F 42.4 40 39.3 43.1 48.9 57.5 64.3 65.6 63.1 58.1 50.9 47.1

The warmest water temperature is in August with an average around 64°F / 17.8°C. The coldest month is March with an average water temperature of 37.8°F / 3.2°C.


7 day tide forecast for Portland

FriSatSunMonTueWedThu
  • High 5:38am
    (2.58m)
  • Low 11:56am
    (0.43m)
  • High 6:16pm
    (2.56m)
  • Low 12:26am
    (0.59m)
  • High 6:33am
    (2.49m)
  • Low 12:45pm
    (0.51m)
  • High 7:05pm
    (2.59m)
  • Low 1:22am
    (0.55m)
  • High 7:29am
    (2.43m)
  • Low 1:33pm
    (0.55m)
  • High 7:52pm
    (2.65m)
  • Low 2:15am
    (0.48m)
  • High 8:23am
    (2.41m)
  • Low 2:20pm
    (0.57m)
  • High 8:38pm
    (2.72m)
  • Low 3:05am
    (0.39m)
  • High 9:15am
    (2.43m)
  • Low 3:06pm
    (0.56m)
  • High 9:22pm
    (2.8m)
  • Low 3:51am
    (0.28m)
  • High 10:03am
    (2.47m)
  • Low 3:49pm
    (0.53m)
  • High 10:04pm
    (2.89m)
  • Low 4:34am
    (0.18m)
  • High 10:47am
    (2.52m)
  • Low 4:32pm
    (0.48m)
  • High 10:46pm
    (2.99m)
7 day tide times for Portland

*These tide times are estimates based on the nearest accurate location (Portland, Maine) and may differ by up to half an hour depending on distance. Please note, the tide times given are not suitable for navigational purposes.