Northern lights Saint John tonight
Saint John sits at 57°N magnetic latitude on the Bay of Fundy - Kp 3-4 from dark coastal sites. Fundy Trail Parkway and Fundy National Park give open northern horizons across the bay. Best season: August to April.
Aurora visibility - Saint John
Unlikely tonight
Kp 1 is well below the Kp 3–4 threshold needed for aurora to be visible from Saint John.
Current Kp
1
of 9
7-day outlook for Saint John
Today
21 May
Tomorrow
22 May
Sat
23 May
Sun
24 May
Mon
25 May
Tue
26 May
Wed
27 May
Based on CME arrival predictions from NASA DONKI. Arrival times ±6 hours.
What Kp is needed here?
Saint John sits at a magnetic latitude of approximately 57°N. The Kp index - a global measure of geomagnetic activity on a scale from 0 (quiet) to 9 (extreme storm), updated every 3 hours - needs to reach Kp 3–4 before the auroral oval expands far enough south to be visible from here.
At Kp 3–4, visibility is possible from Saint John but skies need to be clear and dark. Cloud cover and light pollution remain the main obstacles even when Kp is high enough.
Best dark sky sites near Saint John
Light pollution is the biggest obstacle after cloud cover. These sites give you the best dark northern horizon within reach.
Fundy Trail Parkway
Get directions ↗The Fundy Trail Parkway runs along the Bay of Fundy coast east of Saint John and provides some of the darkest accessible sky in New Brunswick. The coastal cliff edge gives a clear northern horizon with the bay to the south. The parkway closes its main gate in winter but the entrance area remains accessible. Bortle 2 conditions on the outer headlands with no settlement lighting to the north across open water. A Kp 3 storm produces a clear arc from the cliff tops.
Fundy National Park - Point Wolfe
Get directions ↗Fundy National Park on the upper bay coast has earned recognition as a dark sky preserve. Point Wolfe area at the park's south end gives a clear coastal horizon. The park campground provides an accessible base, and the park's interior is largely free of artificial lighting. On a Kp 3-4 night, aurora displays - arcs and bands above the tree line - are consistently visible from park clearings. The tidal bays and coastal cliffs of Fundy make this the best-positioned dark sky site near Saint John.
Kouchibouguac National Park
Get directions ↗A coastal national park on the Northumberland Strait with flat terrain, lagoon beaches, and almost no light pollution to the north across the strait. The park is a designated dark sky preserve. The barrier beach at Kelly's Beach gives an unobstructed 180-degree northern horizon across open water. On a Kp 3 night, this is one of the best aurora observation positions in Atlantic Canada. The distance from Saint John makes it a target for significant storm forecasts rather than marginal nights.
Best time to see the northern lights in Saint John
Saint John's aurora season runs from late September through to March, when nights are long enough for truly dark skies. The equinox months, September and March, bring a natural boost in geomagnetic activity, making them statistically the best of the season. Summer months bring too much twilight for aurora to be visible at this latitude.
Activity peaks around the September and March equinoxes, when Earth's magnetic field geometry is most favourable for coupling with the solar wind. Events during these two windows tend to produce the strongest displays of the year for observers at Saint John's latitude.
April through August brings persistent astronomical twilight that washes out aurora completely. Even strong events (Kp 6+) remain invisible during this period because the sky never gets dark enough.
Related pages
Northern Lights Canada
Canada-wide aurora forecast hub.
Northern Lights Nova Scotia Tonight
Nova Scotia - Kejimkujik Gold Tier Dark Sky Preserve.
Northern Lights Quebec City Tonight
Quebec City - Charlevoix and Laurentides dark sky.
Northern Lights Ontario
Ontario-wide aurora hub - Algonquin and Killarney dark sky.
What Is the Kp Index?
How Kp determines aurora visibility at 57°N magnetic latitude.
Common questions
Aurora watching near Saint John - Fundy coast, dark sky sites, and what to expect.
