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The weather is beautiful in the Grand Circle region and the water at Lake Powell is surprisingly warm for most of the season. It can get pretty hot in July and August compared to the milder months of May, June or September. Springtime (March, April & May) can sometimes be windy and the water is still chilly (you may need a wetsuit for skiing). Spring weather is unpredictable and a cold snap in March is not uncommon. September is an ideal month for travel to Lake Powell for many adventures as the air temperature has cooled off a bit, yet the water is still extremely warm and the crowds have dispersed somewhat. It rains more in September. Early October is still surprisingly a great time to visit Lake Powell as long as the weather holds. The lake is relatively empty of visitors and the water is usually still warm enough for skiing or swimming — even into the third week of the month. However, is seems as if more and more visitors have discovered that traveling during the “shoulder seasons” is a wonderful time to visit.
Average water temperatures fluctuate from a chilly 46 degrees F in February to an inviting 80 degrees F in August.
Cold water months: January, 47; March, 52; December, 53; April 54; November 62.
Warmest water months: July and September, 76; June, 70; May, 64, October, 69. Don’t let cold water scare you away, there’s always fishing!
Water Temperatures are available through the National Park Service at 928-608-6404 — Carl Hayden Visitor Center keeps track.
Monthly Climate Summary
Average high, average low and water temperatures in degrees Fahrenheit are as follows:
|Month||Avg. High||Avg. Low||Avg. Surface Water Temp|