Today’s work window has closed
Sealcoating weather in Oʻahu today
That’s a wrap for today.
Here’s how tomorrow (Tuesday, July 21) is shaping up in Oʻahu: caution. It’s an early look — the full, live area-by-area call refreshes each morning.
Check back in the morning for the live call.
Forecast refreshed each morning — check the latest before you commit a crew.
All 14 spots we forecast in Oʻahu · tomorrow
| Location | Tomorrow | Why & rain odds |
|---|---|---|
| Town (south shore) | ||
| Downtown Honolulu | Caution | wet surface · 76% chance |
| Waikīkī / Kapahulu | Caution | pavement drying after rain · 57% chance |
| Kalihi / Salt Lake | Caution | wet surface · 82% chance |
| Hawaiʻi Kai / ʻĀina Haina | Caution | pavement drying after rain · 65% chance |
| Mauka valleys | ||
| Mānoa / Makiki mauka | Caution | wet surface · 85% chance |
| Windward side | ||
| Kailua | Caution | wet surface · 85% chance |
| Kāneʻohe | Caution | wet surface · 85% chance |
| Waimānalo | Caution | wet surface · 85% chance |
| Leeward side | ||
| Kapolei | Caution | pavement drying after rain · 27% chance |
| ʻEwa Beach | Caution | pavement drying after rain · 28% chance |
| Waiʻanae coast | Caution | wet surface · 20% chance |
| Central Oʻahu | ||
| Mililani / Waipiʻo | Caution | wet surface · 81% chance |
| Wahiawā | Caution | wet surface · 81% chance |
| North Shore | ||
| Haleʻiwa / North Shore | Caution | pavement drying after rain · 36% chance |
Chance = odds of rain heavy enough to threaten a fresh sealcoating job, across the work + cure window. High risk is our call, not a rule — the odds of a redo are real, so we'd wait; caution means it's workable with care. Either way it's your crew, so check the sky and radar before you commit.
This is today's snapshot. The next 7 days for your exact ZIP — with the reasons behind every caution and stop, refreshed each morning — are what the free Sunday brief delivers.
What's driving the tomorrow call
What's limiting work
- wet surface
- pavement drying after rain
Precautions & technique
- rain in the forecast — sealcoat needs a dry surface; pick a dry window and check radar
- windy for spray sealcoat — squeegee application
- near dew point — sealcoat dries slow
Air-temperature forecast logic — verify surface conditions on site.
What the temperature means for sealcoating tomorrow
Tomorrow runs about 4° warmer than a typical July (87° vs a 83° normal), so a fresh coat flashes and sets faster — a shorter dry window is enough to cure. Temperature aside, it's rain and wind that decide the call tomorrow — see the breakdown above.
Source≈10-yr ERA5 reanalysis (Open-Meteo), 2015–2024
Get the full 7-day sealcoating plan for your ZIP
Your area's likely workdays, caution windows, and weather stops — with the reasons — before you schedule the crew.
Next 7 days, Oʻahu-wide
This is the metro-wide shape. The free Sunday brief pins each day to your exact ZIP's area — with the reasons behind every caution and stop — for every trade you run.
What controls a sealcoating day in Oʻahu
Around Oʻahu, sealcoating and paving track a year-round window, timed around windward showers. The gate isn't the calendar — it's stringing together a 50°F-and-rising, rain-free window long enough to cure. The area's year-round trade-wind warmth, wetter in winter, with windward showers that often skip leeward is what opens and shuts that window.
These thresholds come from the manufacturers and standards cited above — the physics is the same anywhere. What's specific to Oʻahu is when they line up, which is exactly what the live area-by-area call at the top of this page tracks each day.
When sealcoating gets tricky in Oʻahu
Rain stays fairly steady month to month here, so a sealcoatingday comes down to the daily cure window and which part of the metro you're in more than the season. Temperatures here stay above the 50°F sealcoatingminimum year-round, so it's rain — not cold — that sets the calendar. Source ≈10-yr ERA5 reanalysis (Open-Meteo), 2015–2024
Common questions
How cold is too cold to sealcoat a driveway in Oʻahu?
Sealer needs to be applied at 50°F and rising and held near that through the cure — SealMaster's data sheet and Ohio DOT's laydown table both draw the line at 50°F. Below that it won't set properly.
How long before rain can you sealcoat in Oʻahu?
Plan for roughly 24 hours of dry weather after applying — rain inside the cure window washes the coat off before it has set. In Oʻahu, year-round trade-wind warmth, wetter in winter, with windward showers that often skip leeward is exactly why the rain-free window is the thing to time.
Can you sealcoat when it's humid or there's dew in Oʻahu?
The pavement has to be dry going down, and a dew point within about 5°F of the air temperature slows drying significantly. High humidity stretches cure time — our daily call flags it.