Is it raining now in Kapaa?
Sunny
9 JulNo upcoming precipitation for the next hour.
Last update: 15:00, 9 Jul 2026
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Rain in Kapaa: What You Need to Know
Kapaa, Hawaii experiences orographic rain and Kona storms. The Kapaa rain radar delivers real-time NEXRAD data from PHKI (South Kauai) / PHMO (Molokai), updated every 4–6 minutes at up to 250-meter resolution. Storms in this part of Hawaii typically approach from southwest Kona or northeast trade wind, and RainViewer's hyperlocal radar shows their exact position and direction so you can act before conditions change.
A standard forecast covers the broader Hawaii region. RainViewer shows the actual cell over Kapaa right now — with direction arrows and a 2-hour nowcast so residents and visitors can make real decisions, not guesses.
Rain by Season in Kapaa
Peak rain season (October–February (Kona storm season for leeward areas); year-round windward)
Kapaa's highest weather risk aligns with October–February (Kona storm season for leeward areas); year-round windward. Orographic rain and kona storms drives precipitation events in this region.
Transition months
Seasonal transitions bring variable conditions — a live radar is more reliable than a forecast during these less predictable windows.
Drier season (May–September leeward)
Precipitation probability drops in Kapaa during May–September leeward, allowing outdoor activities to proceed with lower weather risk.
Why You Need a Rain Radar in Kapaa
Commuters and Drivers in Kapaa
A radar check before leaving gives Kapaa drivers 20+ minutes to adjust timing or avoid flood-prone roads. Real-time NEXRAD is more actionable than a forecast probability for daily commute decisions in Hawaii.
Outdoor Planning in Kapaa
Residents and visitors planning outdoor activities in Kapaa benefit from knowing exactly when rain will arrive from southwest Kona or northeast trade wind. A live radar replaces forecast uncertainty with a real decision window.
RainViewer Radar Coverage in Kapaa
RainViewer aggregates radar data for the United States from the NEXRAD network operated by NOAA's National Weather Service — 160 WSR-88D stations covering the contiguous US, Alaska, Hawaii, and US territories. Data updates every 4–6 minutes as each station completes its scan cycle. RainViewer processes and displays NEXRAD data at up to 250-meter resolution. For Kapaa, Hawaii, the primary NEXRAD source is PHKI (South Kauai) / PHMO (Molokai).
Kapaa Rain Radar: Frequently Asked Questions
- Does Kapaa flood when it rains?
Kapaa can experience localized flooding during intense rain events, particularly in low-lying areas near drainage channels. Orographic rain and kona storms means runoff can accumulate quickly in parts of Hawaii. A live radar provides advance warning before conditions develop.
- When is the rainy season in Kapaa?
Kapaa's primary rain season runs through October–February (Kona storm season for leeward areas); year-round windward. The driest period is typically May–September leeward.
- Is there a live rain radar for Kapaa?
Yes — RainViewer shows live NEXRAD data for Kapaa at up to 250-meter resolution, updated every 4–6 minutes from PHKI (South Kauai) / PHMO (Molokai). The hyperlocal radar includes current precipitation, storm direction, and a 2-hour nowcast.
- Can I set a rain alert for Kapaa?
RainViewer Essential sends a rain alert 10–15 minutes before precipitation reaches your saved location in Kapaa, Hawaii. Set an alert for your specific address — not just a general Hawaii area warning.
Track Rain in Kapaa in Real Time
Rain can arrive in Kapaa faster than a forecast update — a live radar gives you the window to act.
Forecasts cover Hawaii broadly. RainViewer shows the cell position over Kapaa right now.
Your weather app shows rain likely near Kapaa. RainViewer shows the cell position and minutes to arrival.
Track rain in Kapaa — free Upgrade to Essential for alerts, forecasts, and full radar history
2-hour forecast in 5-minute slices
see when rain will reach Kapaa
Rain alerts before arrival
set an alert for your Kapaa address
Direction arrows
storms approach Kapaa from southwest Kona or northeast trade wind
48 hours of radar history
review recent rain patterns in Kapaa
Multiple locations
track Kapaa alongside nearby communities
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