Spanish Bay-South Moss Surf Break

Lat Long: 36.62° N 121.95° W

Spanish Bay-South Moss Sea Temperature and Wetsuit Guide

Issued: 10 am 20 Sep 2026 (local time)

Forecast update in  hr  min

Today's Spanish Bay-South Moss sea temperature is
16.0°C
0.6° 

Spanish Bay-South Moss surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Spanish Bay-South Moss sea temperature is 16.0 °C

(Slightly warmer than usual (0.6° above average))

Mean: 15.4 °C
Range: 14.2 °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 Spanish Bay-South Moss water temperature is rather cool (16 °C) and the air temperature will feel about the same. 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 Spanish Bay-South Moss. 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.

Spanish Bay-South Moss 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.

Spanish Bay-South Moss sea water temperatures peak in the range 14 to 18°C (57 to 64°F) on around the 24th of September and are at their coldest on about the 6th of April, in the range 11 to 14°C (52 to 57°F). The maximum seasonal sea water temperatures at Spanish Bay-South Moss in the fourth week of September lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. The coldest sea water temperatures at Spanish Bay-South Moss in the first week 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 Spanish Bay-South Moss 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 Spanish Bay-South Moss. Refer to our detailed weather forecasts for this information.

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