East Lake Okoboji — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in East Lake Okoboji, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in East Lake Okoboji today is 26.9°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
Table of Daily Sea Temperature Data
| Date | Current | Average | Forecast |
|---|---|---|---|
| AUG 4 | 27.3°C | 25.0°C | |
| AUG 5 | 27.2°C | 25.0°C | |
| AUG 6 | 26.7°C | 25.0°C | |
| AUG 7 | 26.5°C | 25.0°C | |
| AUG 8 | 26.3°C | 25.0°C | |
| AUG 9 | 26.4°C | 25.0°C | |
| AUG 10 | 26.5°C | 25.0°C | |
| AUG 11 | 26.5°C | 25.0°C | |
| AUG 12 | 25.0°C | 26.8°C | |
| AUG 13 | 25.0°C | 26.7°C | |
| AUG 14 | 25.0°C | 26.6°C | |
| AUG 15 | 25.0°C | 26.5°C | |
| AUG 16 | 25.0°C | 26.4°C | |
| AUG 17 | 25.0°C | 26.3°C | |
| AUG 18 | 25.0°C | 26.2°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.
Monthly Water Temperature Range (Min, Max & Average)
| Month | Min | Avg | Max |
|---|---|---|---|
| January | 2°C | 5°C | 7°C |
| February | 1°C | 4°C | 6°C |
| March | 3°C | 6°C | 8°C |
| April | 5°C | 10°C | 15°C |
| May | 11°C | 16°C | 21°C |
| June | 15°C | 20°C | 23°C |
| July | 21°C | 24°C | 28°C |
| August | 22°C | 25°C | 28°C |
| September | 18°C | 21°C | 23°C |
| October | 8°C | 14°C | 20°C |
| November | 1°C | 6°C | 10°C |
| December | 2°C | 4°C | 7°C |
East Lake Okoboji: Water Temperature by Location
East Lake Okoboji: Weather Forecast
August 12
August 13
August 14
August 15
August 16
Location & Local Information
East Lake Okoboji’s surface temperatures change a lot through the year. In spring the water typically runs cool, roughly 40–60°F (4–16°C) as the lake recovers from winter stratification. By summer, surface temperatures commonly warm to about 68–80°F (20–27°C), with the warmest readings in July and August when swimming is most comfortable. In early fall the lake cools again to around 45–65°F (7–18°C) as air temperatures drop. In winter the surface can freeze, with near-surface water at or just above freezing (around 32–39°F / 0–4°C) beneath the ice until thaw in spring.
Swimming in East Lake Okoboji is generally allowed and is a popular recreational activity in warmer months because summer temperatures reach comfortable ranges and there are publicly accessible shoreline areas and beaches. However, conditions sometimes restrict swimming: ice cover prevents safe swimming in winter, and occasional blue‑green algal (cyanobacterial) blooms or other water‑quality advisories in late summer can lead local authorities to post temporary no‑swim warnings. Lifeguard presence, designated swimming zones, and water‑quality updates vary by location and season, so swimmers should follow posted guidance and check current advisories before entering the water.