October is a great time to visit Hawaii for pleasant weather.
October is the last month of the dry season in Hawaii, which is characterized by low levels of rainfall and humidity, and plenty of sunshine.
In the capital city of Honolulu, the average temperatures in October range from 21°C (69°F) to 29°C (84°F). The average rainfall is 29.7 mm (1.2 in).
There can be some variations in weather from island to island. For example, the average temperatures on Maui and Kauai may be cooler, reaching as low as 15°C (60°F), while the rainfall on Kauai may be higher, reaching 207.6 mm (8.2 in).
Read on for more detailed information about Hawaii weather in October.
Average temperature
The average high and low temperatures in October on each of the main Hawaiian islands are shown in the table below.
In October, the average high temperatures in Hawaii range from 24°C (76°F) to 29°C (84°F), while the average low temperatures range from 15°C (60°F) to 26°C (79°F).
The temperatures vary by island, with the hottest temperatures typically found on Oahu and the coolest on Maui.
| Island | Average High | Average Low |
| Hawaii | 27°C / 81°F | 26°C / 79°F |
| Maui | 25°C / 77°F | 15°C / 60°F |
| Oahu (Honolulu) | 29°C / 84°F | 21°C / 69°F |
| Kauai | 24°C / 76°F | 16°C / 60°F |
| Molokai | 28°C / 82°F | 20°C / 68°F |
| Lanai | 26°C / 79°F | 19°C / 66°F |
| Niihau | 27°C / 81°F | 26°C / 79°F |
| Kahoolawe | 26°C / 80°F | 22°C / 71°F |
For more context, the graph below illustrates the average maximum temperatures in the capital city of Hawaii, Honolulu, throughout the year.
You can see that in October, the last month of the dry season, the temperature slightly decreases in comparison to the previous dry months.
Average seawater temperature
The average temperature of seawater in October on each of the main Hawaiian islands is shown in the table below.
The average seawater temperature in the Hawaiian islands in October is fairly consistent, ranging from 26.4°C (79.5°F) to 26.8°C (80.2°F). The temperatures on the islands vary just a little.
The seawater temperature in October in Hawaii is ideal for swimming, surfing, snorkeling, and other water sports.
| Island | Average Temperature |
| Hawaii | 26.5°C / 79.7°F |
| Maui | 26.5°C / 79.7°F |
| Oahu (Honolulu) | 26.8°C / 80.2°F |
| Kauai | 26.5°C / 79.7°F |
| Molokai | 26.4°C / 79.5°F |
| Lanai | 26.5°C / 79.7°F |
| Niihau | 26.6°C / 79.9°F |
| Kahoolawe | 26.6°C / 79.9°F |
For better context, in the chart below, you can find the average seawater temperature in the Honolulu area across all months of the year.
Average rainfall
The table below illustrates the average rainfall and the number of rainy days in October on each of the main Hawaiian islands.
As you can see, in October, the average rainfall in Hawaii ranges from 13.2 mm (0.5 in) on Molokai to 207.6 mm/8.2 in on Kauai. The number of rainy days ranges from 1 on Molokai to 22 on Kauai.
While October is considered part of the dry season in Hawaii, there is still some chance of rainfall, especially on the windward (eastern) sides of the islands.
| Island | Total Rainfall | Number of Rainy Days |
| Hawaii | 48 mm / 1.9 in | 2 |
| Maui | 44.1 mm / 1.7 in | 3 |
| Oahu (Honolulu) | 29.7 mm / 1.2 in | 3 |
| Kauai | 207.6 mm / 8.2 in | 22 |
| Molokai | 13.2 mm / 0.5 in | 1 |
| Lanai | 39.9 mm / 1.6 in | 3 |
| Niihau | 85 mm / 3.3 in | 4 |
| Kahoolawe | 34.5 mm / 1.4 in | 3 |
The chart below gives more context on precipitation in Hawaii by showing the average rainfall by month in Honolulu, situated on Oahu island.
Hawaii weather in October – FAQ
Is October rainy in Hawaii?
October is the last month of the dry season in Hawaii, which means that it is generally a sunny and dry time to visit.
On average, rainfall is less than 50 mm (2 in) across the main Hawaiian islands, and the number of rainy days is usually 3 or fewer.
Is it still hot in Hawaii in October?
Despite the fact that October is the last month of the dry season in Hawaii, the temperature in Hawaii in October is still warm.
The maximum temperatures range from 24°C (76°F) to 29°C (84°F) across the main Hawaiian islands. The average seawater temperature is also warm, ranging from 26.4°C (79.5°F) to 26.8°C (80.2°F).
These temperatures are similar to those in September, which is considered the warmest month in Hawaii.
Is Hawaii crowded in October?
The level of crowding in Hawaii can vary depending on a number of factors, including the time of year, school holidays, events and festivals, and flight deals.
October is considered a shoulder season in Hawaii, which means there are fewer crowds than during the peak season.
However, it is still a popular time to visit Hawaii, especially for those who want to take advantage of the lower travel costs and smaller crowds compared to the peak season.
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