Marina State Beach Surf Break

Lat Long: 36.75° N 121.81° W

Marina State Beach Sea Temperature and Wetsuit Guide

Issued: 10 am 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Marina State Beach sea temperature is
16.1°C
0.8° 

Marina State Beach surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Marina State Beach sea temperature is 16.1 °C

(Slightly warmer than usual (0.8° above average))

Mean: 15.3 °C
Range: 14.1 °C to 17.7 °C
Statistics for 20 Sep (1981–2005)
  • wetsuit boots for warmth, grip, and protection in cold temperatures

Today, many surfers would wear a spring wetsuit and neoprene boots.

The water temperature at Marina State Beach is rather cool (16 °C) and the air temperature will feel similar. A good quality spring wetsuit with optional neoprene boots should suffice. No need for wetsuit gloves.

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 Marina State Beach. 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.

Marina State Beach 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.

Marina State Beach water temperatures peak in the range 14 to 18°C (57 to 64°F) on around the 23rd of September and are at their coldest on about the 7th of April, in the range 10 to 14°C (50 to 57°F). The highest seasonal water temperatures at Marina State Beach in the fourth week of September lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. The coldest water temperatures at Marina State Beach in the first part of April are ideally suited to a 4/3mm wetsuit + 3mm boots, although a 5/3mm wetsuit may be preferable for longer sessions and cold windy days.

Actual sea surface water temperatures close to shore at Marina State Beach 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 Marina State Beach. Refer to our detailed weather forecasts for this information.

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