World sea water temperatures

Water temperature in Onset (MA) in April

Is it warm enough to swim in Onset in April? Average water temperature in Onset in April is 45.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Onset in April is 54.3°F, and the coldest is 36.5°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Onset

Changes water temperature in Onset in April 2025, 2024

To get an accurate forecast for the water temperature in Onset for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Onset, the selected years in the table also show the values of the maximum and minimum temperatures on each of the days of April.

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
April 145°F42.6°F36.5°F45.3°F
April 243.9°F42.1°F36.9°F45.9°F
April 343°F42.1°F37.2°F45.3°F
April 442.8°F43°F37.8°F45.3°F
April 543.3°F42.3°F38.1°F45.7°F
April 643.5°F42.3°F38.7°F45.5°F
April 743.7°F43°F38.8°F46°F
April 844.8°F42.3°F39.2°F46.4°F
April 944.2°F42.8°F39.2°F47.3°F
April 1043.7°F43°F39.7°F47.5°F
April 1143.7°F44.4°F40.6°F46.9°F
April 1243.7°F47.3°F41°F47.3°F
April 1343.7°F46.9°F41.4°F48.2°F
April 1443.2°F46°F41.9°F49.3°F
April 1544.6°F46.9°F42.3°F49.6°F
Day 2025 2024 Min Max
April 1644.1°F49.6°F41.9°F50.5°F
April 1745.5°F48.9°F41.4°F51.1°F
April 1845.9°F48.7°F41.9°F50.7°F
April 1945°F48.2°F41.7°F50.2°F
April 2047.5°F49.5°F41.7°F50.4°F
April 2146.8°F48.6°F43°F51.1°F
April 2247.1°F48.7°F44.1°F51.3°F
April 2349.6°F48°F44.4°F50.9°F
April 2449.5°F50.2°F45.3°F51.4°F
April 2550.4°F49.3°F45.7°F51.4°F
April 2650°F49.1°F45.9°F51.8°F
April 2752.3°F48.9°F46°F52.3°F
April 2852.5°F48.9°F45.7°F52.5°F
April 2952.2°F50.5°F45.5°F52.2°F
April 3054.3°F50.5°F46°F54.3°F
Onset water temp chart in April

Average water temperature in Onset in April over a decade

20162017201820192020
46°F44.1°F43.5°F47.1°F45.5°F
20212022202320242025
46.9°F48.2°F48.2°F46.4°F46.2°F

Onset sea state in April

Chart comparing the height of waves in Onset in April over the past years. The red line indicates the height of the waves when swimming in the sea is prohibited. To view the current sea conditions, click on the graph.

Waves height in Onset in April

Onset water temperature during other months:

You can also view information about water temperature for other months by clicking on the month button below

Where is the warm sea water in April?

Want to know where the water temperature in April is good for swimming? Select the continent of interest, the day of the month and the required water temperature

Region
Date (day and month)
Water temperature: min 60°F
 Average temperature  Maximum temperature

Temperature in neighboring cities

The nearest locations with the average water temperature in April. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Weweantic45.5°F36.5°F54.5°F
Monument Beach45.3°F36.1°F52.7°F
Pocasset45.3°F36.1°F52.7°F
Old Silver Beach45.3°F36.1°F52.7°F
Wareham45.3°F36.1°F52.7°F
Bourne45.3°F36.1°F52.7°F
North Falmouth45.3°F36.1°F52.7°F
Little Harbor Beach45.3°F36.1°F52.7°F
Buzzards Bay45.3°F36.1°F52.5°F
East Wareham45.3°F36.1°F52.5°F

Massachusetts photo gallery

  • Massachusetts
  • Black rock beach. Cohasset ma
  • Golden@sunset
  • Massachusetts

If you have interesting photos of this place, you can upload them here. Photos will be available to all users after verification by the moderator.

Vote for Massachusetts best beach

Current rating: (0 votes cast)

If you know this place (Onset) and want to leave your comment or rate it, then fill out the following form.

Your rating for this place:

Does this place have a "Blue Flag" award [1], are there rip currents and what type of beach is it, sand or pebble:

Is the beach a dog-friendly place, child friendly or a nudist beach?


Your comments for this place (water quality, crowds, facilities, activities, lifeguards, service etc.):



[1] - The "Blue Flag" is awarded to beaches which fulfill a number of criteria, including: the quality of the bathing water, which must be in accordance with the relevant European Union Directive environmental education and information and beach area management and safety.

Get widget or API for your website

Our report for Onset is compiled using satellite data together with in-situ observations to get the most reliable daily data of sea surface temperatures, surf forecasts, current temperatures and weather forecasts.

Contact us: admin@seatemperature.info
privacy policy