Tonight
Jul 9 - Jul 10
- 78 °F
22 percent cloud cover - 71 °F
3 percent cloud cover - 69 °F
69 percent cloud cover
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Northern Lights Forecast for Portland
Portland, Maine, United States
43°39′32.8″N ⋅ 70°15′24.5″W
Aurora data last updated at
Current local time:
No significant aurora activity is expected in Portland over the next 24 hours. Sky will be dark from 9:44 PM to 3:48 AM local time. Cloud cover around that time looks partly cloudy at around 35%.
Aurora Forecast for Portland, ME
Today at 2:00 PM
No activity
Cloud Cover:52%
Aurora activity
High clouds
Middle clouds
Low clouds
Fog
Aurora activity
High clouds
Middle clouds
Low clouds
Fog
Hourly aurora forecast for Portland
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3-Night Weather Forecast for Portland, ME
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Tomorrow night
Jul 10 - Jul 11
- 77 °F2 percent cloud cover
- 71 °F2 percent cloud cover
- 68 °F61 percent cloud cover
Saturday night
Jul 11 - Jul 12
- 72 °F
14 percent cloud cover - 68 °F2 percent cloud cover
- 66 °F0 percent cloud cover
Sun & Moon
Sunset
Sunrise
Dark from 09:44 PM to 03:48 AM (6 h 4 min)
Current Moon
Waning Crescent
30% illumination
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Long-Term Aurora Forecast for Portland, ME
| Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|
Thursday, July 9, 2026. Today. No aurora activity. Aurora score 0 out of 10. Last quarter, 32% illumination | Friday, July 10, 2026. No aurora activity. Aurora score 0 out of 10. Waning crescent, 21% illumination | Saturday, July 11, 2026. No aurora activity. Aurora score 0 out of 10. Waning crescent, 12% illumination | Sunday, July 12, 2026. No aurora activity. Aurora score 0 out of 10. Waning crescent, 6% illumination | |||
Monday, July 13, 2026. No aurora activity. Aurora score 0 out of 10. New moon, 1% illumination | Tuesday, July 14, 2026. No aurora activity. Aurora score 0 out of 10. New moon, 0% illumination | Wednesday, July 15, 2026. No aurora activity. Aurora score 0 out of 10. New moon, 2% illumination | Thursday, July 16, 2026. No aurora activity. Aurora score 0 out of 10. Waxing crescent, 6% illumination | Friday, July 17, 2026. No aurora activity. Aurora score 0 out of 10. Waxing crescent, 13% illumination | Saturday, July 18, 2026. No aurora activity. Aurora score 0 out of 10. Waxing crescent, 21% illumination | Sunday, July 19, 2026. No aurora activity. Aurora score 0 out of 10. Waxing crescent, 31% illumination |
Monday, July 20, 2026. No aurora activity. Aurora score 0 out of 10. First quarter, 41% illumination | Tuesday, July 21, 2026. No aurora activity. Aurora score 0 out of 10. First quarter, 51% illumination | Wednesday, July 22, 2026. No aurora activity. Aurora score 0 out of 10. First quarter, 60% illumination | Thursday, July 23, 2026. No aurora activity. Aurora score 0 out of 10. Waxing gibbous, 69% illumination | Friday, July 24, 2026. No aurora activity. Aurora score 0 out of 10. Waxing gibbous, 78% illumination | Saturday, July 25, 2026. No aurora activity. Aurora score 0 out of 10. Waxing gibbous, 85% illumination | Sunday, July 26, 2026. No aurora activity. Aurora score 0 out of 10. Waxing gibbous, 91% illumination |
Monday, July 27, 2026. No aurora activity. Aurora score 0 out of 10. Waxing gibbous, 96% illumination | Tuesday, July 28, 2026. No aurora activity. Aurora score 0 out of 10. Full moon, 99% illumination | Wednesday, July 29, 2026. No aurora activity. Aurora score 0 out of 10. Full moon, 100% illumination | Thursday, July 30, 2026. No aurora activity. Aurora score 0 out of 10. Full moon, 99% illumination | Friday, July 31, 2026. No aurora activity. Aurora score 0 out of 10. Full moon, 97% illumination | Saturday, August 1, 2026. No aurora activity. Aurora score 0 out of 10. Waning gibbous, 92% illumination | Sunday, August 2, 2026. No aurora activity. Aurora score 0 out of 10. Waning gibbous, 85% illumination |
Monday, August 3, 2026. No aurora activity. Aurora score 0 out of 10. Waning gibbous, 77% illumination | Tuesday, August 4, 2026. No aurora activity. Aurora score 0 out of 10. Last quarter, 67% illumination | Wednesday, August 5, 2026. No aurora activity. Aurora score 0 out of 10. Last quarter, 57% illumination |
LowAurora ActivityHigh
Northern Lights in Portland
Found in Maine, Portland offers unique opportunities for aurora hunters visiting United States. Situated far south at 43.7°, the auroral oval rarely reaches this area. While it takes patience and luck, catching a display from here is an unforgettable experience.
FAQ
What Kp index do I need to see the northern lights in Portland?
In Portland, you usually need at least Kp 7 to have a reasonable chance of seeing the northern lights. Lower Kp can still bring a faint aurora display low on the northern horizon, but it is less common.
This is based on magnetic latitude, and Kp index is a global geomagnetic index, so treat it as a rule of thumb, not a location-specific guarantee.
Tonight, the NOAA Kp index forecast is 2.6 to 3.8. That is below the usual Kp index threshold for Portland, so seeing the aurora is unlikely.