Low Activity 🌕 100% Updated live

Aurora Forecast for
Portsmouth Tonight

Real-time northern lights conditions for Portsmouth, New Hampshire, United States. Latitude 43.1°N · Magnetic latitude 47.6°

Aurora Probability

5%

Low Likelihood

Chance of visible aurora tonight

Best Time

23:00

– 01:00

Optimal viewing window

Kp Index

2

Low

Planetary geomagnetic activity

Cloud Cover

65%

Overcast

Current sky visibility

Aurora

Tonight's Verdict

Low aurora probability in Portsmouth tonight. Check back tomorrow for updated conditions.

🌕 Warning: Bright moonlight (100%) may reduce aurora visibility.

Hourly Forecast

00
00:00 — 5%
01:00 — 5%
02:00 — 5%
03:00 — 5%
04:00 — 5%
05:00 — 5%
06
06:00 — 5%
07:00 — 5%
08:00 — 5%
09:00 — 5%
10:00 — 5%
11:00 — 5%
12
12:00 — 5%
13:00 — 5%
14:00 — 5%
15:00 — 5%
16:00 — 5%
17:00 — 5%
18
18:00 — 5%
19:00 — 5%
20:00 — 5%
21:00 — 5%
22:00 — 5%
23:00 — 5%
00:00 06:00 12:00 18:00 23:00
Time (UTC)Aurora Probability (%)
00:005%
01:005%
02:005%
03:005%
04:005%
05:005%
06:005%
07:005%
08:005%
09:005%
10:005%
11:005%
12:005%
13:005%
14:005%
15:005%
16:005%
17:005%
18:005%
19:005%
20:005%
21:005%
22:005%
23:005%

27-Day Forecast

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Apr 3

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Apr 4

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Apr 5

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About Aurora Viewing in Portsmouth

Sitting at a latitude of 43.1°N, Portsmouth provides a a possible location base for northern lights hunting. To see the aurora borealis from here, you'll generally need the Kp index to reach 6+. Head to a dark spot between 10 PM and 2 AM local time, and make sure the skies are clear.

Aurora Hunt provides real-time alerts, cloud cover maps, and aurora probability forecasts specifically for Portsmouth. Download the app to get notified when conditions are perfect for viewing.

Learn More & Prepare

How to Read a Forecast

Master the three core metrics — Kp index, cloud cover, and darkness.

Kp Index Explained

Understand the 0–9 scale that drives predictions and viewing latitudes.

Photography Guide

Settings and smartphone tips to capture stunning aurora photos.

Frequently Asked Questions

Can you see aurora in Portsmouth tonight?
Aurora visibility in Portsmouth depends on geomagnetic activity (Kp index), cloud cover, and darkness. At 43.1°N latitude, Portsmouth typically needs a Kp index of 6+ for visible aurora. Check the real-time forecast above for tonight's conditions.
What time is best to see northern lights in Portsmouth?
The best time to see aurora in Portsmouth is typically between 10 PM and 2 AM local time, when skies are darkest. Aurora can appear any time after astronomical twilight, but peak activity usually occurs around local midnight.
Where to watch aurora in Portsmouth?
For the best aurora viewing in Portsmouth, find a location away from city light pollution with a clear view to the north. Dark areas outside the city center, elevated viewpoints, and spots near water are ideal. Check cloud cover before heading out.
What Kp index is needed to see aurora in Portsmouth?
Portsmouth is at 43.1°N latitude and typically requires a Kp index of 6+ for visible aurora. Higher Kp values mean stronger geomagnetic storms and better aurora visibility, even at lower latitudes.
Is Portsmouth, United States a good place to see northern lights?
Portsmouth can see aurora during strong geomagnetic storms. Located at 43.1°N, aurora is visible when Kp index reaches 6+ or higher.

Nearby Aurora Destinations

Aberdeen

47.0°N View →

Aberdeen

45.5°N View →

Abington

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Acton

42.5°N View →

Adams

42.6°N View →

Agate Beach

44.7°N View →

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