Kailua-Kona — Water Temperature, Sea Conditions & Trends
This page provides clear and up-to-date information about water temperature for Kailua-Kona (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 Kailua-Kona help you plan your visit and choose the best time for swimming.
Current Water Temperature
Water temperature in Kailua-Kona in the Pacific Ocean today is 28°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature is above 82°F (28°C). This is very warm water, which may feel almost hot to most people. Swimming in such conditions is perfect for those seeking relaxation and comfort in the water. These waters are often preferred for relaxation in hot weather, as the water temperature does not cool the body significantly. However, it is important to remember that in such warm waters, caution is necessary, as prolonged exposure without rest can lead to overheating.
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 Kailua-Kona has risen over the last week and month. Currently, the sea water at this location is slightly warmer than average for this day in previous years.
According to our forecast, Water temperature in Kailua-Kona will be 27.6°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 |
|---|---|---|---|
| SEP 13 | 28.0°C | 27.0°C | |
| SEP 14 | 28.0°C | 27.3°C | |
| SEP 15 | 28.0°C | 27.3°C | |
| SEP 16 | 28.0°C | 27.3°C | |
| SEP 17 | 28.2°C | 27.5°C | |
| SEP 18 | 28.2°C | 27.3°C | |
| SEP 19 | 28.3°C | 27.3°C | |
| SEP 20 | 28.5°C | 27.5°C | |
| SEP 21 | 28.4°C | 27.3°C | 28.4°C |
| SEP 22 | 27.3°C | 28.3°C | |
| SEP 23 | 27.5°C | 28.2°C | |
| SEP 24 | 27.3°C | 28.1°C | |
| SEP 25 | 27.3°C | 28.0°C | |
| SEP 26 | 27.0°C | 27.9°C | |
| SEP 27 | 27.3°C | 27.7°C | |
| SEP 28 | 27.0°C | 27.6°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
Kailua Kona, on the western shore of Hawaii’s Big Island, enjoys warm Pacific waters year-round with modest seasonal variation. Sea temperatures typically range from about 24°C in the coolest months (late winter) to roughly 29°C in the warmest weeks of summer and early autumn, with an annual average near 26–27°C. Local conditions can shift slightly with currents and occasional upwelling that bring cooler water, and visibility generally stays high thanks to clear tropical seas. Trade winds and seasonal northwesterly swells influence surface conditions, so while the temperature remains inviting, rougher seas in winter can cool the nearshore experience and alter ideal swimming spots.
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 | 25°C | 26°C |
| April | 23°C | 25°C | 27°C |
| May | 23°C | 26°C | 27°C |
| June | 24°C | 26°C | 28°C |
| July | 24°C | 27°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 | 25°C | 27°C | 28°C |
| December | 24°C | 26°C | 27°C |
* Click on a month to view detailed water temperature data.
Kailua-Kona: Weather Forecast
September 22
September 23
September 24
September 25
Location, Beaches & Local Information
Nearby Beaches & Facilities
Old Kona Airport Beach Park
Old Kona Airport State Recreational Area
Honl's Beach
Pawai Beach
Banyan's Surfing Area
Alula Beach
Aiopio Beach
Aimakapa Beach
Kamakahonu Beach
Swimming Conditions
For a beach-focused holiday, Kona offers a variety of safe, warm-water options for swimming, snorkeling, and other water activities. Sheltered bays and reef-protected areas provide calm conditions and excellent visibility for casual swimmers and snorkelers observing reefs and tropical fish, while more exposed beaches deliver better waves for surfing and bodyboarding when conditions are right. Evening manta-ray snorkels and scuba trips are a notable specialty here, giving swimmers the chance to encounter large marine life under guided conditions. Visitors should watch local advisories for rip currents and surf forecasts, and consider a light rashguard or short wetsuit only during cooler spells or for prolonged water time; for most swimmers, the water temperature is comfortable without heavy thermal protection.