March is a transitional month in Hawaii, with weather patterns beginning to shift from the wet season to the dry season.
While you can expect mostly sunny days, it’s wise to bring an umbrella for the possibility of unexpected showers.
In March, you can also observe humpback whales migrating to Hawaiian shores for mating and the first plumeria flowers of the year.
Keep on reading to find out about Hawaii weather in March in more detail.
Average temperature
In the table below, you can find the average high and low temperatures in March on each of the main Hawaiian islands.
The temperatures in March are warm and pleasant, ranging from 22°C (72°F) to 26°C (79°F) for the average high, and from 13°C (55°F) to 23°C (74°F) for the average low.
| Island | Average High | Average Low |
| Hawaii | 24°C / 75°F | 23°C / 74°F |
| Maui | 22°C / 71°F | 13°C / 55°F |
| Oahu (Honolulu) | 26°C / 78°F | 18°C / 64°F |
| Kauai | 22°C / 72°F | 13°C / 56°F |
| Molokai | 25°C / 77°F | 17°C / 63°F |
| Lanai | 24°C / 75°F | 16°C / 61°F |
| Niihau | 24°C / 75°F | 22°C / 72°F |
| Kahoolawe | 25°C / 76°F | 20°C / 67°F |
As context, the graph below presents the average maximum temperatures in the capital city of Hawaii, Honolulu, for the entire year.
Average seawater temperature
The table below displays the average seawater temperature for each of the main Hawaiian islands in March.
In March, the average seawater temperature in the Hawaiian Islands ranges from 23.9°C (75°F) on Kauai to 24.6°C (76.3°F) on Hawaii, and Kahoolawe.
These temperatures are relatively consistent across the islands, with just a 0.7°C (1.3°F) difference between the highest and the lowest average temperatures.
| Island | Average Temperature |
| Hawaii | 24.6°C / 76.3°F |
| Maui | 24.5°C / 76°F |
| Oahu (Honolulu) | 24.3°C / 75.7°F |
| Kauai | 23.9°C / 75°F |
| Molokai | 24.2°C / 75.6°F |
| Lanai | 24.5°C / 76°F |
| Niihau | 24.2°C / 75.6°F |
| Kahoolawe | 24.6°C / 76.3°F |
To get a better perspective, the chart below displays the average seawater temperature in the Honolulu area across the whole year.
Average rainfall
The table below presents the data on the average rainfall and rainy days in March on each of the main Hawaiian islands.
March is the last month of the wet season in Hawaii, so rain is still a common occurrence on the islands during this time.
In March, the average rainfall in Hawaii ranges from 31.1 mm (1.2 in) on Kahoolawe Island to 207 mm (8.1 in) on Kauai.
| Island | Total Rainfall | Number of Rainy Days |
| Hawaii | 48 mm / 1.9 in | 2 |
| Maui | 85.5 mm / 3.4 in | 6 |
| Oahu (Honolulu) | 38.3 mm / 1.5 in | 5 |
| Kauai | 207 mm / 8.1 in | 19 |
| Molokai | 38 mm / 1.5 in | 2 |
| Lanai | 43.9 mm / 1.7 in | 4 |
| Niihau | 117 mm / 4.6 in | 5 |
| Kahoolawe | 31.1 mm / 1.2 in | 3 |
The chart below displays the average rainfall by month in Honolulu, the capital city located on Oahu island, for more context.
Hawaii weather in March – FAQ
Is it warm enough to swim in Hawaii in March?
Depending on the island, the average seawater temperature in Hawaii in March ranges from 23.9°C (75°F) to 24.6°C (76.3°F). These temperatures are considered suitable for swimming.
How hot is Hawaii in March?
Hawaii has warm weather in March, with average high temperatures ranging from 22°C (72°F) to 26°C (79°F) and average low ranging from 13°C (55°F) to 18°C (64°F), depending on the island.
The seawater temperature in March is also quite warm, ranging from 23.9°C (75°F) to 24.6°C (76.3°F).
Overall, the weather in Hawaii in March is generally warm and pleasant, making it a good time for outdoor activities and beach trips.
How hot is Hawaii in March?
The weather in Hawaii in March is warm and pleasant, with average high temperatures ranging from 22°C (72°F) to 26°C (79°F) and average low temperatures ranging from 13°C (55°F) to 18°C (64°F) depending on the island.
However, March is a part of the wet season in Hawaii, so you should be prepared for the possibility of occasional showers.
March is a good time to visit Hawaii as the weather is generally pleasant and warm, and the crowds are not as heavy as they are during the peak tourist season in the summer months.
Prices for flights and accommodations may also be more affordable in March than in the peak season.
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