Northern Lights in New Hampshire: Tonight's Aurora Forecast

Q: Can I see the northern lights tonight in New Hampshire?

Check the live panel on this page: it compares tonight's NOAA forecast Kp with the Kp 5 that New Hampshire's darkest northern areas need, then folds in tonight's cloud cover and the moon. As a rule, a forecast Kp of 5 or higher with under 40% cloud and a dark northern horizon is worth going out for; below Kp 4 it is not.

Q: What Kp do you need to see the northern lights in New Hampshire?

About Kp 5 for a display low on the northern horizon from New Hampshire's darkest northern spots, and roughly Kp 7 for it to climb overhead. New Hampshire sits near 53° geomagnetic latitude; every ~2° further south adds about one Kp step to what you need.

Q: Where is the best place to see the northern lights in New Hampshire?

Lake Francis State Park, Pittsburg; Milan Hill State Park; Lake Umbagog. The Connecticut Lakes region at the top of the state — nearest towns to the north are in Québec. The common thread is a dark, unobstructed view to the north — a lakeshore, open prairie, or a summit — well away from city glow.

Q: What is the best time of year to see the northern lights in New Hampshire?

September, October, November, March, April. Geomagnetic storms cluster around the equinoxes (the Russell–McPherron effect), and the autumn and spring windows combine that with long, dark nights. Deep winter adds the most hours of darkness, often with the clearest air.

Q: What time of night are the northern lights most visible in New Hampshire?

Usually between 10 pm and 2 am local time, with the most intense substorms often near local magnetic midnight (roughly 11 pm–1 am). Give your eyes 15–20 minutes to adapt, and stay out — displays come in waves separated by quiet half-hours.

Q: Why does the aurora look gray or white to my eyes but green in photos?

At New Hampshire's latitude the aurora is usually faint and low, and the eye's night vision cannot see color in dim light. A phone in night mode or a camera with a 5–15 second exposure collects far more light and shows the true green (oxygen at ~100 km) and red (oxygen higher up). If you can see a pale, moving arc that is not a cloud, photograph it.

Q: How do I photograph the northern lights with a phone in New Hampshire?

Use night mode (iPhone) or Night Sight / Pro mode (Android), set exposure to 3–10 seconds, brace the phone on something or use a small tripod, turn the flash off, and point at the darkest part of the northern sky. Tap to focus on a distant light or a star first. Shoot wide and keep shooting — the best frames come during brightenings that last only a minute or two.

Q: How often can you see the northern lights in New Hampshire?

Several times a year near solar maximum, when the forecast reaches Kp 5 — but you also need a clear, moonless night and a dark northern horizon, which removes most of them. Watch NOAA's 3-day Kp forecast and be ready to drive.

New Hampshire needs about Kp 5 on the northern horizon. Live NOAA Kp, tonight's cloud cover and moon, the aurora oval map, and the darkest places to watch from.

Aurora season is open — equinox weeks bring the most storms

Kp needed

Kp 5

Current Kp

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Best months

Sep · Oct · Nov

The New Hampshire aurora season at a glance

Live · NOAA SWPC

Today

Autumn aurora season — the September equinox brings the year's most geomagnetically active weeks, with dark nights returning.

Spring aurora season — the March equinox is the second annual peak, while nights are still long.

Kp 5

Kp needed

≈53° geomagnetic lat.

Sep / Oct

best months

Nov, Mar, Apr

Lake Francis State Park

darkest site

est. Bortle 2

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current Kp

reading NOAA…

The 10 May 2024 G5 storm produced pink and green pillars photographed from Mount Washington's summit and from the Connecticut Lakes — NOAA rated it G5, the top of its scale.

Live · tonight

Can you see the northern lights tonight in New Hampshire?

The verdict below combines NOAA SWPC's planetary Kp forecast with the Kp 5 that New Hampshire's darkest northern spots need, tonight's cloud cover from Open-Meteo at Lake Francis State Park, the moon, and the hours of full darkness. Then each city and dark-sky site gets its own cloud reading — the sky often clears inland when the lakeshore or coast is socked in.

Reading NOAA SWPC and Open-Meteo for Lake Francis State Park · New Hampshire tonight…

Tonight, city by city and site by site

Location	Cloud tonight	Kp tonight	Verdict
Concord, NH city	…	…	…
Nashua, NH city	…	…	…
Berlin, NH city	…	…	…
Lake Francis State Park, Pittsburg est. Bortle 2	…	…	…
Milan Hill State Park est. Bortle 3	…	…	…
Lake Umbagog est. Bortle 2	…	…	…
Mount Washington Auto Road base, Pinkham Notch est. Bortle 3	…	…	…

Cloud is the 9 pm–3 am average from Open-Meteo for each point; Kp is NOAA SWPC's maximum forecast for tonight. City rows use a city-center location — drive to a dark northern horizon for the real thing.

Interactive

The aurora oval over New Hampshire right now

NOAA's OVATION model maps where aurora is likely overhead in the next 30–90 minutes. Green cells mean a small chance, red a strong one. The map opens on Lake Francis State Park; enter a ZIP to recenter, and widen the span to see the whole oval across Canada.

Loading the NOAA OVATION aurora forecast…

Where to go

Best places to see the northern lights in New Hampshire

Moose Alley (Route 3 north of Pittsburg) is the state's best aurora road — drive slowly, pull fully off, and look for the green arc above the spruce line. Concord and Nashua need a Kp 7 storm to see anything through the glow.

Lake Francis State Park, Pittsburg

est. Bortle 245.13, -71.36

The Connecticut Lakes region at the top of the state — nearest towns to the north are in Québec.

Milan Hill State Park

est. Bortle 344.57, -71.21

A fire-tower summit with a 360° view north over the Androscoggin valley.

Lake Umbagog

est. Bortle 244.78, -71.05

Wide shallow lake on the Maine line; the north shore is refuge land with no lights.

Mount Washington Auto Road base, Pinkham Notch

est. Bortle 344.26, -71.23

Pull-offs along Route 16 look north up the notch when the summit is fogged in.

Northern lights photographed in Maine on 11 May 2024. “Northern Lights seen from the United States on May 11, 2024 - 4” — USDAgov — Public domain

The year, phase by phase

When to see the northern lights in New Hampshire

JanFebMarAprMayJunJulAugSepOctNovDec

September – November autumn season

The equinox weeks around September 22 are statistically the most geomagnetically active of the year, and nights are long again. In New Hampshire this is prime time — a Kp 5 night shows an arc on the northern horizon, and clear, dry autumn air helps.

December – February long dark nights

Fewer storms than the equinoxes but 14+ hours of darkness and often the clearest, driest air of the year. Dress for it — the best displays come after midnight.

March – April spring season

The March equinox brings the second annual peak in geomagnetic storms. Nights are still long in March, and New Hampshire's snow cover makes the landscape glow under even a faint display. By late April the late sunsets start to cut into viewing time.

May – August short nights

Short nights and twilight — summer haze and late sunsets make faint displays hard to see. Big storms still punch through: NOAA rated the 10–11 May 2024 event G5, the top of its scale, and it was seen across most of the lower 48.

Field guide

How to see — and photograph — the aurora from New Hampshire

3 days out

Watch the NOAA 3-day Kp forecast (the bar strip above). For New Hampshire, a forecast of Kp 5+ is the trigger. Coronal-hole high-speed streams give 2–3 days' notice; a coronal mass ejection arrives 1–3 days after it leaves the Sun.

Day of

Check tonight's cloud cover and the moon here, then pick the clearest of the sites above. A bright moon will not stop a strong display but washes out a faint one — favor the week around new moon when you have the choice.

After dark

Get a dark, open northern horizon — a lakeshore, a ridge, open farmland — 30+ miles from city glow. Turn off the headlights, give your eyes 20 minutes, and look for a pale arc or moving patches low in the north that are not cloud. Stay 10 pm–2 am; activity comes in waves.

Phone settings

iPhone: Night mode, set to 10 s (30 s on a tripod), flash off, brace the phone. Android: Night Sight or Pro mode, ISO 1600–3200, 5–15 s, manual focus at infinity. Camera: widest lens, f/2.8 or faster, ISO 1600–6400, 3–10 s — shorter as the display brightens and moves.

A person standing on a snowy road photographing the northern lights with a phone — Modern phone night modes see far more aurora than your eyes do — if a faint arc looks suspicious, photograph it. “Sky Fires (16236524763)” by Per from Kaministiquia, Canada, CC BY-SA 2.0

Why New Hampshire needs Kp 5

Kp, geomagnetic latitude, and solar cycle 25

The aurora forms in an oval around the geomagnetic pole, which sits over northern Canada rather than at the geographic pole. That tilt is why the eastern United States is magnetically "further north" than the West: New Hampshire is at about 53° geomagnetic latitude. The planetary K-index (Kp, 0–9) measures how disturbed Earth's magnetic field is; as Kp rises, the oval expands toward the equator by roughly 2° of latitude per step. From New Hampshire's darkest northern areas, Kp 5 brings the oval's edge into view on the horizon; Kp 7 puts it overhead.

NOAA's G-scale is a simpler label on the same thing: G1 (Kp 5) minor, G2 (Kp 6) moderate, G3 (Kp 7) strong, G4 (Kp 8) severe, G5 (Kp 9) extreme. Solar cycle 25 reached its maximum in 2024–2025 — NOAA rated the 10–11 May 2024 storm G5, the top of its scale — and the declining phase of a cycle historically produces the biggest individual storms, so 2026 and 2027 remain good years to watch. Storms also cluster near the equinoxes, which is why September–October and March–April are "aurora season" everywhere in the lower 48.

Green aurora arc over a snowy spruce forest near Chena Hot Springs, Alaska — Under the oval: at Fairbanks, Alaska (≈65° geomagnetic) this is an ordinary Kp 2 night. The same display needs a Kp 5 storm to reach New Hampshire. “The Aurora over chenasprings, outside of fairbanks” by Analogick, CC BY 2.0

Common questions

New Hampshire northern lights FAQ

Can I see the northern lights tonight in New Hampshire?

What Kp do you need to see the northern lights in New Hampshire?

Where is the best place to see the northern lights in New Hampshire?

What is the best time of year to see the northern lights in New Hampshire?

What time of night are the northern lights most visible in New Hampshire?

Why does the aurora look gray or white to my eyes but green in photos?

How do I photograph the northern lights with a phone in New Hampshire?

How often can you see the northern lights in New Hampshire?

Keep planning

More New Hampshire nights and seasons

New Hampshire first frost datesTypically September 25 — the first clear, cold aurora nights follow.New Hampshire fall foliagePeak color September 28 – October 14 — pair a leaf trip with aurora season.New Hampshire tick forecastStanding in tall grass at night in September? Check tick activity first.

More Northeast northern lights forecasts

Live Kp, NOAA scales and the OVATION aurora model are read in your browser from NOAA's Space Weather Prediction Center (services.swpc.noaa.gov); cloud cover and sunrise/sunset from Open-Meteo. Kp thresholds are climatological rules of thumb for a dark northern horizon, not guarantees, and Bortle classes are estimates. Hero image: “Northern Lights seen from the United States on May 11, 2024 - 4” — USDAgov — Public domain. National picture: which states can see the aurora tonight → · check your ZIP →