Is lightning near Portsmouth right now?
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Free push alert when lightning approaches Portsmouth. Your exact location and alerts live in the app.
Thunderstorm season near Portsmouth
Portsmouth sits in New Hampshire, which averages about 20 thunderstorm days a year — below the US average of 25. Lightning near Portsmouth is most frequent June–August.
- NH thunderstorm days/yr
- 20
- Peak season
- June–August
- vs US average
- 0.8×
State-level NOAA climatology; a city-specific thunderstorm-day normal isn’t published for every station.
Lightning safety in Portsmouth
When thunderstorms build over Portsmouth, the distance to the nearest strike matters more than a city-wide count. Use the 30-30 rule: if thunder follows lightning by 30 seconds or less, get indoors, and wait 30 minutes after the last thunder before heading back out. StrikeCast surfaces the distance and trend so you can act before the storm reaches you.
StrikeCast app
Distance, trend & alerts — in your pocket.
GPS-precise distance to the nearest strike, live approaching/moving-away trend, and a push alert before the storm reaches you — no need to keep the app open.
Your exact location stays on your device. Never shared. Never tracked.
Frequently asked
How far away is the nearest lightning to Portsmouth?
StrikeCast shows the live distance in miles to the nearest strike near Portsmouth, updated continuously from NOAA GOES-GLM satellite data, plus whether it is approaching or moving away.
Is it safe to be outside in Portsmouth right now?
If you can hear thunder, you are close enough to be struck. Follow the 30-30 rule: shelter when thunder follows lightning by 30 seconds or less, and wait 30 minutes after the last thunder. StrikeCast's distance and trend help you decide before the storm arrives.
When is thunderstorm season in Portsmouth?
Portsmouth sees the most lightning June–August, averaging about undefined thunderstorm days a year.
Can I get lightning alerts for Portsmouth?
Yes. Get the free StrikeCast app, save Portsmouth, and you will get a push alert when lightning approaches — no need to keep the app open.