West Lake Okoboji — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in West Lake Okoboji, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in West Lake Okoboji today is 19.6°C.
Water Temperature: Daily Trends, Historical Records, and Forecast
⚠️ As of today, the minimum water temperature ranges from 65°F (18°C) to 68°F (20°C). This is already quite warm water, which is ideal for most people. Swimming becomes comfortable, and prolonged stays in the water do not cause discomfort. This temperature is perfect for family trips and for those who prefer warmer water. It is also comfortable for water sports such as surfing or swimming. 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 |
|---|---|---|---|
| SEP 14 | 21.8°C | 21.0°C | |
| SEP 15 | 21.9°C | 21.0°C | |
| SEP 16 | 20.8°C | 21.0°C | |
| SEP 17 | 21.1°C | 21.0°C | |
| SEP 18 | 20.4°C | 21.0°C | |
| SEP 19 | 19.9°C | 21.0°C | |
| SEP 20 | 19.3°C | 21.0°C | |
| SEP 21 | 19.6°C | 21.0°C | |
| SEP 22 | 21.0°C | 19.7°C | |
| SEP 23 | 21.0°C | 19.7°C | |
| SEP 24 | 21.0°C | 19.8°C | |
| SEP 25 | 21.0°C | 19.9°C | |
| SEP 26 | 21.0°C | 20.0°C | |
| SEP 27 | 21.0°C | 20.0°C | |
| SEP 28 | 21.0°C | 20.1°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 | 0°C | 1°C | 4°C |
| February | 0°C | 2°C | 5°C |
| March | 1°C | 4°C | 6°C |
| April | 4°C | 9°C | 15°C |
| May | 9°C | 15°C | 21°C |
| June | 15°C | 19°C | 23°C |
| July | 21°C | 24°C | 28°C |
| August | 21°C | 24°C | 28°C |
| September | 17°C | 21°C | 25°C |
| October | 10°C | 15°C | 20°C |
| November | 4°C | 7°C | 10°C |
| December | 1°C | 3°C | 6°C |
West Lake Okoboji: Water Temperature by Location
West Lake Okoboji: Weather Forecast
September 21
September 22
September 23
September 24
September 25
Location & Local Information
West Okoboji Lake, part of the Iowa Great Lakes in northwest Iowa, experiences pronounced seasonal changes in surface water temperature. In summer months (June–August) surface temperatures typically climb into the mid‑70s to low‑80s °F (about 24–28 °C), offering the warmest conditions for recreation. Spring (March–May) and fall (September–November) bring much cooler water, often ranging from the low‑40s to mid‑60s °F (4–18 °C) depending on air temperatures and recent weather. In winter the lake approaches freezing at the surface, commonly around 32–39 °F (0–4 °C) on cold spells, and it can develop ice cover during sustained cold periods; deeper water remains somewhat warmer. Short‑term variations occur with wind, depth, and inflow, so actual readings will vary day to day.
Swimming in West Okoboji is generally allowed and popular during the warm months, with public beaches and private shorelines used for recreation. Local authorities monitor water quality and post advisories if bacterial contamination or harmful algal (cyanobacterial) blooms are detected; such advisories can temporarily prohibit swimming for health reasons. Early‑season and late‑season swimmers should be aware of cold‑water risks like reduced swim ability and cold shock. Lifeguards are present at some regulated beaches, but users should always check current conditions and posted notices before entering the water.