World sea water temperatures

Water temperature in Alcatraz (CA) in April

Is it warm enough to swim in Alcatraz in April? Average water temperature in Alcatraz in April is 55.8°F and therefore is not suitable for comfortable swimming. The warmest sea in Alcatraz in April is 61.9°F, and the coldest is 51.1°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Alcatraz

Changes water temperature in Alcatraz in April 2025, 2024

To get an accurate forecast for the water temperature in Alcatraz for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Alcatraz, 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 156.1°F55.8°F51.8°F58.1°F
April 256.3°F57.4°F51.3°F58.5°F
April 355.8°F57.7°F51.1°F58.6°F
April 455.8°F57.7°F51.1°F58.6°F
April 555.9°F58.1°F51.1°F58.3°F
April 657°F56.3°F51.1°F58.1°F
April 757.7°F56.7°F51.4°F58.1°F
April 856.7°F57°F51.6°F59.2°F
April 957°F56.5°F51.6°F59.7°F
April 1057.4°F57°F51.6°F60.1°F
April 1158.8°F57.4°F52°F59.2°F
April 1259.2°F57.6°F52.2°F59.2°F
April 1357.7°F57°F52°F59.2°F
April 1458.5°F57°F51.6°F58.8°F
April 1559°F55.9°F51.4°F59°F
Day 2025 2024 Min Max
April 1659.9°F55.8°F51.1°F59.9°F
April 1758.8°F56.8°F51.3°F59°F
April 1858.1°F57.7°F51.3°F60.1°F
April 1958.3°F58.3°F51.3°F60.4°F
April 2058.5°F59.2°F51.3°F60.6°F
April 2157.9°F57.6°F51.3°F60.8°F
April 2257.6°F58.5°F51.8°F60.4°F
April 2357.4°F57.6°F51.8°F60.3°F
April 2457.6°F57°F52.2°F60.4°F
April 2558.3°F58.5°F52.2°F60.3°F
April 2658.5°F59.5°F51.8°F60.1°F
April 2757.6°F59°F51.8°F60.6°F
April 2855.8°F59.5°F52°F61.3°F
April 2956.8°F60.3°F51.8°F61.9°F
April 3057°F60.8°F51.3°F61.5°F
Alcatraz water temp chart in April

Average water temperature in Alcatraz in April over a decade

20162017201820192020
58.8°F56.8°F58.3°F58.8°F58.1°F
20212022202320242025
56.8°F57.9°F55.4°F57.7°F57.6°F

Alcatraz sea state in April

Chart comparing the height of waves in Alcatraz 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 Alcatraz in April

Alcatraz 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

Best Beach Resorts in California in April

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

AvrMinMax
San Diego60.4°F54.1°F66.6°F
Santa Monica58.6°F54°F63.9°F
La Jolla Cove61.2°F55.6°F68.7°F
Lake Tahoe44.6°F40.8°F52.7°F
Los Angeles58.8°F54.9°F63.7°F
Angel Island55.8°F51.1°F61.9°F
Marshall's Beach55.2°F50.9°F60.4°F
Paradise Beach Park55.8°F51.1°F62.1°F
Albany55.9°F51.1°F63°F
North Beach56.1°F51.1°F63.7°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 Alcatraz 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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