Oahu — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Oahu (Hawaii, United States). It includes the current water temperature, daily data for the last month presented in a simple chart, and a 7-day forecast. The page also compares today’s value with typical averages for this period, shows usual monthly ranges during the year, and lists nearby beaches with short descriptions. Local weather for the next few days and general details about Oahu help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Oahu in the Pacific Ocean today is 26°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 79°F (26°C) to 82°F (28°C). This is very warm water, allowing for extended stays without any discomfort. Swimming in these conditions will be particularly enjoyable, making it the ideal temperature range for those who want to relax in the sea. Additionally, water in this temperature range is suitable for children and elderly people, as it is comfortable for prolonged stays.
It is important to note that these swimming tips and recommendations apply only in good weather. When the air temperature is below 68°F (20°C), and sometimes even below 77°F (25°C), swimming can be unpleasant even with relatively high water temperatures.
Water Temperature Chart Over the Last 30 Days
Water temperature in Oahu has risen over the last week and month. Currently, the sea water temperature at this location matches the average for this day in previous years.
According to our forecast, Water temperature in Oahu will be 25.9°C in the next 7 days. See the table below for daily data for the upcoming week.
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| JUN 5 | 25.7°C | 25.5°C | |
| JUN 6 | 25.8°C | 25.8°C | |
| JUN 7 | 25.8°C | 26.0°C | |
| JUN 8 | 25.7°C | 25.3°C | |
| JUN 9 | 25.7°C | 25.8°C | |
| JUN 10 | 25.6°C | 25.8°C | |
| JUN 11 | 25.8°C | 25.3°C | |
| JUN 12 | 25.8°C | 25.3°C | |
| JUN 13 | 26.0°C | 25.3°C | 26.0°C |
| JUN 14 | 25.3°C | 26.0°C | |
| JUN 15 | 25.8°C | 26.0°C | |
| JUN 16 | 26.3°C | 25.9°C | |
| JUN 17 | 25.8°C | 25.9°C | |
| JUN 18 | 25.5°C | 25.9°C | |
| JUN 19 | 25.8°C | 25.9°C | |
| JUN 20 | 26.0°C | 25.9°C |
* Current - Actual water temperature value
** Average - Average water temperature on this day in recent years
*** Forecast - Our water temperature forecast
Actual nearshore water temperatures may fluctuate by several degrees from the reported values, especially following heavy rainfall or extended periods of strong winds. Certain wind patterns can cause colder, deeper waters to rise and replace the sun-warmed surface water, leading to noticeable variations.
Our forecast is based on a proprietary mathematical model that considers real-time water temperature changes, historical trends, key weather patterns, wind strength and direction, and air temperature specific to each region. Additionally, we incorporate data from other resorts to enhance accuracy.
Water temperature data for this location is gathered from various sources, including buoys and satellite sea and ocean surface maps provided by the NOAA agency. We also incorporate data from local authorities in each specific location worldwide to ensure more accurate temperature readings.
Annual Water Temperature Overview by Month
Monthly Water Temp Ranges
Annual Water Temperature Trend
Oahu, the third-largest Hawaiian island, enjoys a warm tropical ocean climate with relatively small seasonal shifts in sea temperature. Typical coastal water temperatures range from about 23 °C in the coolest winter months to around 27–28 °C in late summer. Winter swells and northerly winds can briefly cool surface water and stir up sand near shore, while sheltered bays and lagoons tend to stay a degree or two warmer. Surface temperatures around popular snorkeling and swimming spots are generally pleasant year-round, though occasional cold fronts or large surf events may lower temperatures temporarily and affect clarity.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 23°C | 25°C | 26°C |
| February | 23°C | 25°C | 26°C |
| March | 23°C | 24°C | 26°C |
| April | 23°C | 25°C | 26°C |
| May | 23°C | 25°C | 27°C |
| June | 24°C | 26°C | 28°C |
| July | 24°C | 26°C | 28°C |
| August | 25°C | 27°C | 28°C |
| September | 25°C | 27°C | 28°C |
| October | 25°C | 27°C | 29°C |
| November | 24°C | 26°C | 28°C |
| December | 23°C | 25°C | 27°C |
* Click on a month to view detailed water temperature data.
Oahu: Weather Forecast
June 14
June 15
June 16
June 17
Location, Beaches & Local Information
Nearby Beaches & Facilities
West Loch Shoreline Park
Neal S. Blaisdell Park
Aiea Beach Park
Swimming Conditions
Swimming opportunities on Oahu suit a wide variety of visitors, from calm family-friendly beaches and protected reef lagoons to world-class surf breaks for experienced swimmers and surfers. Waikiki and other sheltered south-facing beaches offer shallow, warm water ideal for casual swimming, paddleboarding, and beginner snorkeling, while Hanauma Bay is noted for clear water and abundant reef life when open to visitors. The North Shore is famous for powerful winter surf that draws surfers rather than casual swimmers, and lifeguarded beaches are concentrated where tourist activity is highest. Visitors should be aware of rip currents, changing surf, and reef conservation rules; light protection like a rash guard is often enough, and heavier wetsuits are rarely necessary except for those sensitive to cooler winter water around 23 °C.