Kauai Marathon
Race Day Weather
Warm start, hydrate frequently
Runners will face temperatures starting at 81°F and rising to 83°F, accompanied by high humidity at 78%. A gentle breeze from the E will provide some relief, but runners should adjust their pacing strategy and hydrate frequently to combat the heat. No rain is expected during the race.
Pace Calculator
Get forecast alerts for Kauai Marathon
We'll text or email you when the forecast shifts — so you can adjust gear, pacing, and strategy. Max one per day.
Race Info
The Kauai Marathon and Half Marathon starts and finishes in Poipu, a resort community on Kauai's south shore. The marathon and half marathon share their first 11 miles before the half loops back through Kukui'ula Resort, while the full marathon continues past Lawai and climbs toward Kalaheo before descending back to Poipu. The route passes a stretch of century-old trees known as the Tunnel of Trees and coastal viewpoints above the Pacific. The race is USATF certified. The sold-out 2026 edition was cancelled on September 5, the day before race day, when Hurricane Lowell approached the island; organizers have scheduled the next race for Sunday, September 5, 2027.