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Winthrop Jetty water temperature
Winthrop Jetty ratings
Quality on a good day: 2.3
Consistency of Surf: 2.0
Difficulty Level: 2.8
Wind and Kite Surfing: 1.2
Crowds: 2.4

Overall: 2.0

See all 18 ratings

Based on 25 votes. Vote


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Winthrop Jetty Water Temperature and Wetsuit Guide

(Massachusetts, USA)

Today's Winthrop Jetty sea temperature is 17.2 °C.

Statistics for 15 Jul (1981–2005) – mean: 19.3 °C, range: 17.2 °C to 21.7 °C

Sunny with very warm air temperatures, feeling like 29 °C once we account for air movement. In contrast the sea remains relatively cold (17 °C). Surfers should wear a spring or summer wetsuit though no doubt some would wear less neoprene on such a warm day, no matter what temperature the sea is.

United States Sea Water Temperature

Map of current United States
Surface Water Temperatures
based on measurements from oceanographic satellites
United States Water Temperature Anomaly

Map of current United States
Sea Water Temperature Anomalies

(compared with long term averages
at this time of year)

(click thumbnails to expand)

Below is a graph of Historical Sea Surface Temperature for Winthrop Jetty. This has been derived from analysis of two decades of oceanographic satellite measurements of nearby open water. We have calculated the average water temperature variation around the year as well as the extremes that have been observed on each date.

Winthrop Jetty Water Temperature Graph

All of the graphs for the surf breaks presented on Surf-Forecast.com are on the same scale to enable comparison between locations around the world.

Winthrop Jetty sea temperatures peak in the range 19 to 22°C (66 to 72°F) on around the 10th of August and are at their lowest on about the 28th of February, in the range 2 to 5°C (36 to 41°F). Winthrop Jetty sea temperatures are warmest in early to mid August. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. The lowest sea temperatures at Winthrop Jetty mean that you will need a flexible 6/5/4mm wetsuit or a well fitting 5/4mm wetsuit with gloves and 5mm neoprene booties and a hood to surf here in the fourth week of February.

Actual sea surface water temperatures close to shore at Winthrop Jetty can vary by several degrees compared with these open water averages. This is especially true after heavy rain, close to river mouths or after long periods of strong offshore winds. Offshore winds cause colder deep water to replace surface water that has been warmed by the sun. Air temperature, wind-chill and sunshine should also be considered before deciding on the kind of wetsuit needed to stay warm when surfing at Winthrop Jetty. Refer to our detailed weather forecasts for this information.

 

FEATURE UPDATE: we now show red swell icons for 'open sea' swells that are travelling in an unfavourable direction for the surf break. In places, these swells may still wrap around coastlines and produce smaller waves at some breaks. They are also significant for windsurfers and other water users that tend to venture further off-shore.