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Water temperature in Treasure Island Beach (CA) in October

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Is it warm enough to swim in Treasure Island Beach in October? Average water temperature in Treasure Island Beach in October is 67.5°F and therefore is not suitable for comfortable swimming. The warmest sea in Treasure Island Beach in October is 74.5°F, and the coldest is 63°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Treasure Island Beach

Changes water temperature in Treasure Island Beach in October 2025, 2024

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

You can choose any other years:

Year 1:   Year 2:


Day 2025 2024 Min Max
October 166.2°F64.9°F64.9°F74.5°F
October 266.4°F65.3°F65.3°F74.1°F
October 366.9°F64.6°F64.6°F73.6°F
October 466.4°F64.8°F64.8°F73°F
October 566.7°F65.1°F64.8°F72.3°F
October 6 65.1°F64°F72.5°F
October 7 65.1°F63.7°F72.3°F
October 8 64.9°F63.9°F72.1°F
October 9 65.1°F63.9°F72.9°F
October 10 66.2°F63.9°F73°F
October 11 66.6°F63.9°F73.4°F
October 12 64.8°F63.7°F73.6°F
October 13 65.7°F63.5°F74.1°F
October 14 65.7°F63°F73.9°F
October 15 65.8°F63°F73.4°F
Day 2025 2024 Min Max
October 16 66°F63°F73.4°F
October 17 66°F63°F72.5°F
October 18 66°F63.1°F72.9°F
October 19 65.1°F63.3°F72.1°F
October 20 65.1°F63°F71.6°F
October 21 64.6°F63.3°F72°F
October 22 64.2°F63.5°F71.8°F
October 23 64.2°F63.7°F71.4°F
October 24 64.6°F63.7°F71.6°F
October 25 64.6°F63.7°F71.2°F
October 26 64.8°F63.5°F71.6°F
October 27 64.9°F63.1°F71.4°F
October 28 65.1°F63°F71.1°F
October 29 63.7°F63.5°F70.3°F
October 30 63.3°F63.3°F70°F
October 31 63.1°F63.1°F70.3°F
Treasure Island Beach water temp chart in October

Average water temperature in Treasure Island Beach in October over a decade

20152016201720182019
72.3°F68°F69.3°F67.8°F67.3°F
20202021202220232024
70°F65.1°F68.7°F67.3°F64.9°F

Treasure Island Beach sea state in October

Chart comparing the height of waves in Treasure Island Beach in October 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 Treasure Island Beach in October

Treasure Island Beach 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 October?

Want to know where the water temperature in October 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

Best Beach Resorts in California in October

Places with the warmest average sea water temperature in California in October. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
San Diego66.9°F62.1°F73.8°F
Santa Monica66.4°F60.3°F73.2°F
La Jolla Cove67.3°F63°F73.6°F
Lake Tahoe58.6°F53.2°F64.2°F
Los Angeles66.4°F61°F73.8°F
Monarch Beach67.5°F63°F74.5°F
Dana Strands Beach67.6°F63.1°F74.5°F
Divers Cove67.5°F62.1°F74.3°F
San Clemente67.3°F62.6°F74.7°F
T-Street Beach67.5°F62.2°F74.7°F

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[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.

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Our report for Treasure Island Beach 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.

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