Lake Houston — Current Water Temperature, Annual Trends and Forecast
This page provides information on the current water temperature in Lake Houston, trends, monthly ranges and the forecast for the coming days.
Current Water Temperature
Water Temperature in Lake Houston today is 79°F.
Water Temperature: Daily Trends, Historical Records, and Forecast
✅ As of today, the minimum water temperature ranges from 75°F (23°C) to 79°F (26°C). This is a very comfortable temperature for swimming, and many people can enjoy prolonged stays in the water without feeling cold. The water is pleasantly warm, making it ideal for relaxation and water sports. This temperature range is particularly popular among tourists, as it combines comfort and safety for health. 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 |
|---|---|---|---|
| MAY 6 | 70°F | 73°F | |
| MAY 7 | 75°F | 73°F | |
| MAY 8 | 76°F | 73°F | |
| MAY 9 | 76°F | 73°F | |
| MAY 10 | 77°F | 73°F | |
| MAY 11 | 77°F | 73°F | |
| MAY 12 | 78°F | 73°F | |
| MAY 13 | 78°F | 73°F | |
| MAY 14 | 73°F | 79°F | |
| MAY 15 | 73°F | 78°F | |
| MAY 16 | 73°F | 78°F | |
| MAY 17 | 73°F | 78°F | |
| MAY 18 | 73°F | 77°F | |
| MAY 19 | 73°F | 77°F | |
| MAY 20 | 73°F | 77°F |
* 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 | 46°F | 57°F | 70°F |
| February | 48°F | 58°F | 70°F |
| March | 55°F | 65°F | 75°F |
| April | 55°F | 69°F | 82°F |
| May | 63°F | 73°F | 84°F |
| June | 75°F | 81°F | 86°F |
| July | 77°F | 85°F | 93°F |
| August | 75°F | 82°F | 90°F |
| September | 77°F | 82°F | 88°F |
| October | 72°F | 80°F | 88°F |
| November | 61°F | 68°F | 75°F |
| December | 50°F | 60°F | 72°F |
Lake Houston: Water Temperature by Location
Lake Houston: Weather Forecast
May 14
May 15
May 16
May 17
May 18
Location & Local Information
Lake Houston, a reservoir serving the Houston area, experiences pronounced seasonal swings in surface water temperature. In winter months (December–February) surface temperatures often fall into the 50–60°F range (about 10–16°C). Spring (March–May) typically warms to roughly 60–75°F (16–24°C). Summer (June–August) brings the warmest water, commonly 75–90°F (24–32°C) and occasionally higher during heat waves, while autumn (September–November) sees cooling back into roughly 65–80°F (18–27°C). These are general surface ranges; local conditions such as depth, shading, inflow, and recent weather can shift temperatures from day to day.
Swimming in Lake Houston is possible but not uniformly encouraged across the entire reservoir. Parts of the lake are managed for municipal drinking water, and many areas have restrictions or advisories because of water quality concerns (runoff, algae, bacterial levels) and safety issues like sudden drop-offs, submerged structure, and boat traffic. Recreational parks and designated areas around the lake may permit swimming under posted rules and when water-quality tests are favorable. Visitors should follow local park regulations and current advisories before entering the water for both legal and health reasons.