Hawaii lawn conditions
Updated
Match water to windward vs leeward exposure; mow on schedule; scout insects and fungal spots after wet spells. Honolulu-class Friday near ~83 °F / Saturday ~83 / Sunday ~82 with high shower chances Friday; Kauai/Lihue-class sites near ~82 °F Friday–Sunday with high shower chances after Hurricane Nolo exited west of the International Date Line; Tropical Storm Rachel (~50 mph advisory; no coastal watches/warnings yet; about 955 miles west of the southern tip of Baja California) remains well east of the islands; Central Pacific TWO (200 AM HST Fri Oct 9) expects no tropical cyclone formation next 7 days—local island guidance first.
Do this week
- Water leeward/dry exposures on wilt; cut back windward lawns after frequent showers.
- Mow frequently enough to stay within the one-third rule for bermuda, zoysia, or St. Augustine.
- Split light nitrogen only when turf is actively growing and not waterlogged.
- Scout for tropical sod webworm and armyworm chewing after muggy stretches.
Watch for
- Uneven irrigation from trade winds
- Fungal leaf spots after prolonged leaf wetness
- Nutsedge in chronically wet pockets
- Thatch buildup on aggressive bermuda/zoysia
Regional notes & context
Why this week
Hawaii lawns do not follow a continental dormancy calendar. Early October is still active growth—manage water by exposure and keep scouting rather than copying Mainland fall stop dates blindly.
Seasonal notes
- Island and elevation differences matter more than the statewide label.
- Follow county water rules and local extension species sheets.
Last updated
Content refreshed October 9, 2026 (Friday midday) for Hawaii. Educational orientation only—not a site-specific diagnosis.