Best time to raft › Summer
Season GuideRafting Moab in Summer
Summer is the family season. Flows drop off the runoff peak, the water warms up, and swimming stops being a hazard and starts being the point. It is also the hottest time of year in one of the hottest places in Utah, and heat is what shapes the day.
Late June through August. Flows fall steadily, water is warm, and the Moab Daily is at its most family friendly. Daytime air temperatures above 100°F are normal. Afternoon thunderstorms build through July and August, bringing flash flood risk in side canyons.
What the Water Does
After the runoff peak, flows fall steadily as the snowpack exhausts. By August the rivers are near their seasonal low. Monsoon storms can spike levels briefly and dramatically, particularly on tributaries.
- Whitewater moderates. Rapids get smaller and more predictable. Westwater and Cataract remain serious but are less pushy than at peak.
- The Moab Daily is at its best for families. Warm water, gentle waves, and swimming between rapids.
- Flatwater sections get slow. Less current means more paddling, and wind matters more than ever.
- Water is warm enough to be a relief rather than a risk, which changes the whole character of a hot day.
Who Summer Suits
- Families with children. This is the season minimum ages sit at their lowest and the water is most forgiving.
- First-time rafters. Warm water removes the biggest consequence of falling in.
- Anyone visiting Moab for the parks and adding a half day on the river.
It suits big-water boaters less well. If you want Cataract at its most serious, go in spring.
Managing the Heat
Air temperatures above 100°F are routine in July and August, and there is very little shade on most of these river corridors. Heat illness sends more people into trouble here than the rapids do. Drink far more water than feels necessary, wear a wide brimmed hat with a chin strap, cover up rather than stripping down, and get wet often.
- Start early. Morning departures avoid the worst of both heat and afternoon storms.
- Sun protection over sunscreen alone. Long sleeves in light technical fabric beat bare skin, and reflected light off the water burns places you did not consider.
- More water than you planned. On multi-day trips, a gallon per person per day is a starting point, not a maximum.
- Camp shade is scarce. On overnight trips, a tarp is worth its weight.
Storms and Flash Floods
The North American monsoon brings afternoon thunderstorms to southern Utah through July and August. They are usually brief and often dramatic.
A storm many miles away can send a flash flood down a side canyon while the main river looks entirely normal and the sky above you is clear. Do not camp in a side canyon or a wash, and be cautious about hiking narrow drainages when storms are building anywhere upstream.
Summer Rafting FAQ
Is summer too hot to raft in Moab?
Not on the water, where you can get wet whenever you like. It is hot on shore and during shuttles. Morning trips are more comfortable than afternoon ones.
How warm is the water in summer?
Warm enough to swim comfortably by midsummer, which is a substantial change from spring. Check current water temperature rather than assuming.
Do I still need a wetsuit in summer?
Usually not on day trips by July. Early summer can still be cold, and outfitters will tell you what they provide.
Should I worry about thunderstorms?
Be aware of them. They are typically short, but they bring lightning and flash flood risk in side canyons. Guides monitor conditions; on a private trip that is your responsibility.
Sources
Last reviewed: July 30, 2026. Flows and conditions change constantly. Always check current gauge data before you launch, and if something here is wrong, tell us.