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Water temperature in Honolulu (HI) in October

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Is it warm enough to swim in Honolulu in October? Average water temperature in Honolulu in October is 80.6°F and therefore suitable for comfortable swimming. The warmest sea in Honolulu in October is 82.9°F, and the coldest is 78.3°F. Average high air temperature in Honolulu in October is 87°F, and average low temperature is 73°F. To find out the sea temperature today and in the coming days, go to Current sea temperature in Honolulu

Changes water temperature in Honolulu in October 2025, 2024

To get an accurate forecast for the water temperature in Honolulu for any chosen month, compare two years within a 10 year range using the chart below. In addition to the sea water temperature in Honolulu, 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 180.6°F81.1°F79.5°F82.9°F
October 280.8°F81.1°F79.2°F82.8°F
October 381°F81.3°F78.8°F82.8°F
October 481.3°F81.5°F79°F82°F
October 5 81.1°F79°F82.2°F
October 6 81.1°F79.2°F82.4°F
October 7 81.3°F78.8°F82.2°F
October 8 81.1°F79°F82.4°F
October 9 81°F78.8°F82.6°F
October 10 81°F79.3°F82.4°F
October 11 80.8°F79°F82.4°F
October 12 80.6°F78.8°F82.6°F
October 13 80.6°F78.8°F82.8°F
October 14 81°F78.6°F82.6°F
October 15 80.6°F78.8°F82.9°F
Day 2025 2024 Min Max
October 16 80.4°F79°F82.9°F
October 17 80.4°F78.8°F82.2°F
October 18 80.8°F79.2°F82.2°F
October 19 80.6°F79.5°F82.4°F
October 20 80.4°F79.2°F82.4°F
October 21 80.4°F78.4°F82.2°F
October 22 80.4°F78.6°F82.4°F
October 23 80.6°F78.4°F82.2°F
October 24 80.4°F78.3°F82.2°F
October 25 80.4°F78.4°F82°F
October 26 80.4°F78.6°F82.4°F
October 27 80.2°F79°F82.4°F
October 28 79.3°F79°F82.4°F
October 29 79.9°F78.8°F82.2°F
October 30 79.7°F78.6°F82°F
October 31 80.1°F78.6°F82°F
Honolulu water temp chart in October

Average water temperature in Honolulu in October over a decade

20152016201720182019
81.5°F80.8°F80.8°F81.5°F82.4°F
20202021202220232024
81.7°F79.7°F81.1°F80.8°F80.6°F

Honolulu sea state in October

Chart comparing the height of waves in Honolulu 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 Honolulu in October

Weather and climate in Honolulu in October

This data display average monthly climate indicators in Honolulu in October based on our historical weather readings over a period of ten years. In addition to temperature, we include data on the number of rainy and sunny days so you can have all the information about your destination before your trip

  • Average HIGH temperature87°F
  • Average LOW temperature73°F
  • Average humidity
    68
  • Average rainfall days8 days
  • Average rainfall218mm/8.6''
  • Average daylight12h
  • Average sunshine7.9h
  • Average UV index9

Honolulu 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

Temperature in neighboring cities

The nearest locations with the average water temperature in October. In addition, the maximum and minimum water temperatures for that month, recorded over the last decade, are shown

AvrMinMax
Kaimana Beach80.6°F78.3°F82.9°F
Sans Souci Beach80.6°F78.3°F82.9°F
Diamond Head80.6°F78.3°F82.8°F
Waikiki80.6°F78.3°F82.8°F
Ala Moana80.6°F78.3°F82.8°F
Kahala Beach80.4°F78.3°F82.8°F
Aiea80.6°F78.3°F82.8°F
Pearl City80.6°F78.3°F82.8°F
Hanauma Bay80.4°F78.1°F82.8°F
Sandy Beach80.4°F78.1°F82.8°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 Honolulu 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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