Live soil temperature · 2 inches down
Soil temperature in Honolulu, HI
Right now · 96801
75°FActive
Annual bluegrass (Poa annua) and winter annual weeds: Not open yet: soil is still warm. Aim to have pre-emergent down before it cools past 70°F. Pre-emergent is a product that stops weed seeds before they sprout, so it only works ahead of germination.
By depth
- Surface
- 72.7°F
- 2 in depth
- 75°F
- 6 in depth
- 78.7°F
Past 14 days · 24-hour average
This week in Honolulu
Over the past week, soil 2 inches down in Honolulu, HI ranged from 77.4°F to 79.6°F and fell 1.1°F, averaging 78.6°F.
| Day | Surface | 2 in | 6 in |
|---|---|---|---|
| Mon | 77.5°F | 78.8°F | 79.1°F |
| Tue | 76.7°F | 78.9°F | 79.1°F |
| Wed | 76.3°F | 78.6°F | 78.8°F |
| Thu | 74.9°F | 77.4°F | 78.4°F |
| Fri | 77.4°F | 79.6°F | 78.7°F |
| Sat | 77.4°F | 79.2°F | 79.3°F |
| Sun | 76°F | 77.7°F | 78.4°F |
Daily averages from Open-Meteo for Honolulu, HI 96801. Readings refresh every six hours.
Interpretation
What this means for your grass.
- Bermuda
- Bermuda is still growing, but the season is turning. This is the fall pre-emergent window: get it down before soil falls below 70°F, which is when annual bluegrass and other winter weeds start to germinate.
- Zoysia
- Zoysia is still growing and the season is turning. This is the fall pre-emergent window: get it down before soil falls below 70°F. Ease off nitrogen so you aren't pushing growth into dormancy.
- St. Augustine
- St. Augustine is still growing and the season is turning. This is the fall pre-emergent window: get it down before soil falls below 70°F. Check the label for St. Augustine tolerance before you buy.
- Cool-season
- Still too hot for cool-season grass. Hold fertilizer, keep irrigation up, and wait for soil to cool before seeding or feeding.
Nearest readings
Soil temperature near Honolulu
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Weather data from Open-Meteo. Timing guidance follows the sources on when to apply pre-emergent and how to use soil temperature.Data as of Mon, 12 Oct 2026 00:06:53 GMT