Portland in March
Find out everything about the water temperature in Portland in March. Average, minimum and maximum recorded temperatures as well as daily temperature in March for the last two years. Compare the current month's sea temperature data with other months of the year.
Water temperature in March
Minimum:
43.9 °F
Average:
47.5 °F
Maximum:
50.2 °F
Sea water temperature in Portland in March
In the city of Portland, the month of March is too cold for swimming. The minimum recorded temperature during this month was 43.9°F on March 5, 2018, with an average temperature being 47.5°F and a maximum temperature reaching 50.2°F on March 31, 2019.
| Date | 10 years average | 2024 | 2023 |
|---|---|---|---|
| Mar 1 | 47.4°F | 49.1°F | 47.2°F |
| Mar 2 | 47.3°F | 48.7°F | 46.9°F |
| Mar 3 | 47.2°F | 48.4°F | 47.0°F |
| Mar 4 | 47.0°F | 48.2°F | 47.0°F |
| Mar 5 | 47.1°F | 48.2°F | 46.9°F |
| Mar 6 | 47.1°F | 48.1°F | 46.5°F |
| Mar 7 | 47.1°F | 48.7°F | 46.4°F |
| Mar 8 | 47.2°F | 48.7°F | 46.4°F |
| Mar 9 | 47.2°F | 48.4°F | 46.3°F |
| Mar 10 | 47.2°F | 48.3°F | 46.0°F |
| Mar 11 | 47.1°F | 48.4°F | 46.0°F |
| Mar 12 | 47.1°F | 48.3°F | 46.1°F |
| Mar 13 | 47.1°F | 48.1°F | 46.1°F |
| Mar 14 | 47.2°F | 48.1°F | 46.4°F |
| Mar 15 | 47.3°F | 48.4°F | 46.9°F |
| Mar 16 | 47.4°F | 49.6°F | 46.8°F |
| Mar 17 | 47.6°F | 49.3°F | 46.8°F |
| Mar 18 | 47.6°F | 49.6°F | 47.3°F |
| Mar 19 | 47.7°F | 49.2°F | 47.5°F |
| Mar 20 | 47.5°F | 49.1°F | 47.5°F |
| Mar 21 | 47.7°F | 49.8°F | 47.5°F |
| Mar 22 | 47.7°F | 49.2°F | 48.2°F |
| Mar 23 | 47.8°F | 49.6°F | 47.8°F |
| Mar 24 | 47.8°F | 49.6°F | 47.9°F |
| Mar 25 | 48.0°F | 49.9°F | 48.4°F |
| Mar 26 | 48.1°F | 49.7°F | 48.7°F |
| Mar 27 | 48.1°F | 49.5°F | 48.6°F |
| Mar 28 | 48.0°F | 49.4°F | 48.4°F |
| Mar 29 | 48.1°F | 49.4°F | 48.3°F |
| Mar 30 | 48.1°F | 49.4°F | 48.2°F |
| Mar 31 | 48.2°F | 50.1°F | 48.9°F |
In an average year, Portland offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in Portland was recorded on September 3, 2022, reaching a 67.0°F. While the coldest temperature occurred on March 5, 2018, dipping to 43.9°F. The average readings by season are 49.8°F in Winter, 50.1°F in Spring, 61.3°F in Summer, and 60.3°F in Autumn.
March's temperature is a dip compared to warmer February at 47.7°F and April at 49.7°F.
Popular neighboring cities and resorts
| City | Water temperature* | Distance** |
|---|---|---|
| Bristol |
51.7°F
|
62mi |
| Barry |
53.0°F
|
68mi |
| Cardiff |
52.3°F
|
71mi |
| Cherbourg-Octeville |
56.9°F
|
74mi |
* current water temperature in this city
** straight line distance from Portland