Best Time to Visit Glacier Bay National Park
Planning a trip to Glacier Bay National Park in Alaska? This data-driven guide breaks down every month of the year so you can pick the perfect time to visit. With 3,223,384 acres, 10 trails, and 600,000 annual visitors, timing your trip right can mean the difference between fighting crowds and having trails to yourself.
Best Months to Visit Glacier Bay National Park
Based on historical weather data, June and July and August deliver the best visiting conditions at Glacier Bay National Park. These months combine comfortable temperatures, low precipitation, and the best trail accessibility. Plan your trip during these months for the best chance of clear skies and ideal hiking conditions.
Month-by-Month Breakdown
| Month | High (°F) | Low (°F) | Precip (in) | Rainy Days | Sunny Days | Crowds | Verdict |
|---|---|---|---|---|---|---|---|
| January | 32° | 22° | 5.5" | 17 | 4 | Low | Off-Season |
| February | 35° | 24° | 4.5" | 15 | 5 | Low | Off-Season |
| March | 38° | 26° | 4" | 15 | 6 | Moderate | Off-Season |
| April | 45° | 32° | 3.5" | 14 | 8 | Moderate | Good |
| May | 53° | 38° | 3.5" | 14 | 10 | Moderate | Good |
| June | 59° | 44° | 3" | 14 | 10 | Very High | Peak |
| July | 62° | 48° | 4.2" | 16 | 8 | Very High | Peak |
| August | 61° | 47° | 5.5" | 18 | 6 | Very High | Peak |
| September | 55° | 42° | 6.8" | 19 | 5 | Moderate | Off-Season |
| October | 46° | 35° | 7.5" | 20 | 4 | Moderate | Off-Season |
| November | 37° | 27° | 6.2" | 18 | 3 | Low | Off-Season |
| December | 33° | 23° | 5.8" | 17 | 3 | Low | Off-Season |
January
Off-SeasonJanuary brings challenging conditions to Glacier Bay National Park with temperatures ranging from 22°F to 32°F and 5.5 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Off-season with minimal crowds. Some facilities may be closed but solitude is plentiful.
February
Off-SeasonFebruary brings challenging conditions to Glacier Bay National Park with temperatures ranging from 24°F to 35°F and 4.5 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Off-season with minimal crowds. Some facilities may be closed but solitude is plentiful.
March
Off-SeasonMarch brings challenging conditions to Glacier Bay National Park with temperatures ranging from 26°F to 38°F and 4 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Shoulder season with fewer visitors. A good balance of pleasant weather and lighter crowds.
April
GoodApril is a viable time to visit Glacier Bay National Park though you may encounter some weather challenges. Temperatures range from 32°F to 45°F with about 14 rainy days and 3.5 inches of precipitation. Some trails or roads may have seasonal limitations, so check conditions before your trip.
Shoulder season with fewer visitors. A good balance of pleasant weather and lighter crowds.
May
GoodMay is a viable time to visit Glacier Bay National Park though you may encounter some weather challenges. Temperatures range from 38°F to 53°F with about 14 rainy days and 3.5 inches of precipitation. Some trails or roads may have seasonal limitations, so check conditions before your trip.
Shoulder season with fewer visitors. A good balance of pleasant weather and lighter crowds.
June
PeakJune is one of the best months to visit Glacier Bay National Park with average highs of 59°F and only 3 inches of precipitation. Expect 10 sunny days and temperatures ranging from 44°F to 59°F. Trail conditions are typically excellent, making this an ideal time for hiking, sightseeing, and experiencing the park at its finest.
Peak season with large crowds, long waits, and full campgrounds. Book well in advance.
July
PeakJuly is one of the best months to visit Glacier Bay National Park with average highs of 62°F and only 4.2 inches of precipitation. Expect 8 sunny days and temperatures ranging from 48°F to 62°F. Trail conditions are typically excellent, making this an ideal time for hiking, sightseeing, and experiencing the park at its finest.
Peak season with large crowds, long waits, and full campgrounds. Book well in advance.
August
PeakAugust is one of the best months to visit Glacier Bay National Park with average highs of 61°F and only 5.5 inches of precipitation. Expect 6 sunny days and temperatures ranging from 47°F to 61°F. Trail conditions are typically excellent, making this an ideal time for hiking, sightseeing, and experiencing the park at its finest.
Peak season with large crowds, long waits, and full campgrounds. Book well in advance.
September
Off-SeasonSeptember brings challenging conditions to Glacier Bay National Park with temperatures ranging from 42°F to 55°F and 6.8 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Shoulder season with fewer visitors. A good balance of pleasant weather and lighter crowds.
October
Off-SeasonOctober brings challenging conditions to Glacier Bay National Park with temperatures ranging from 35°F to 46°F and 7.5 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Shoulder season with fewer visitors. A good balance of pleasant weather and lighter crowds.
November
Off-SeasonNovember brings challenging conditions to Glacier Bay National Park with temperatures ranging from 27°F to 37°F and 6.2 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Off-season with minimal crowds. Some facilities may be closed but solitude is plentiful.
December
Off-SeasonDecember brings challenging conditions to Glacier Bay National Park with temperatures ranging from 23°F to 33°F and 5.8 inches of precipitation. Heavy precipitation can cause trail closures and hazardous conditions. Visit only if you are well-prepared for the conditions.
Off-season with minimal crowds. Some facilities may be closed but solitude is plentiful.
When to Avoid
Heavy Rain / Monsoon Season (January, February, July, August, September, October, November, December)
Glacier Bay National Park receives heavy precipitation during January and February and July and August and September and October and November and December, which can lead to flash floods, trail washouts, and hazardous road conditions. Slot canyons and low-lying areas are particularly dangerous during heavy rain events. Monitor weather forecasts closely and be prepared for sudden storms.
Peak Holiday Weekends
Memorial Day weekend, July 4th, and Labor Day weekend bring the largest crowds of the year to Glacier Bay National Park. Expect full parking lots by mid-morning, overcrowded trailheads, and fully booked campgrounds. If you must visit during these weekends, arrive before 8 AM, have backup trail options ready, and book campgrounds or lodging at least 6 months in advance.
Money-Saving Tips
Visit in Shoulder Season (Spring or Fall)
Spring and fall offer pleasant weather at most national parks with significantly lower lodging costs compared to peak summer months. Hotels and vacation rentals near Glacier Bay National Parkcan be 30–50% cheaper in April, May, September, and October compared to June through August.
Buy the America the Beautiful Pass
The America the Beautiful Annual Pass costs $80 and grants unlimited access to all 400+ national parks, forests, and federal recreation areas for a full year. With Glacier Bay National Park's entrance fee at Free, the pass pays for itself in just a few visits. It covers all passengers in a single vehicle.
Camp Instead of Staying at Hotels
Campgrounds inside or near Glacier Bay National Parktypically cost $15–35 per night compared to $150+ for nearby hotels. The park offers in-park camping options. Book campgrounds through Recreation.gov as soon as reservations open (typically 6 months in advance) since popular sites fill quickly, especially for summer dates.
Visit on Free Entrance Days
The National Park Service offers 5–6 free entrance days each year, including Martin Luther King Jr. Day, the first day of National Park Week (April), the anniversary of the Great American Outdoors Act (August), National Public Lands Day (September), and Veterans Day (November). Mark these dates on your calendar to save on entrance fees.
Frequently Asked Questions
What is the best month to visit Glacier Bay National Park?
The best months to visit Glacier Bay National Park are June, July, August. These months offer the most pleasant weather conditions, the best trail accessibility, and ideal temperatures for outdoor activities. July typically provides the best overall weather with 8 sunny days.
When is Glacier Bay National Park least crowded?
Glacier Bay National Park tends to be least crowded during January and February (winter quiet season) and November (between fall foliage and holidays). Avoid holiday weekends such as Memorial Day, July 4th, and Labor Day for shorter trail waits and better campsite availability. Visiting on weekdays during any season will also reduce your exposure to crowds.
What is the weather like at Glacier Bay National Park?
Weather at Glacier Bay National Park varies significantly by season. Summer highs average 62°F while winter highs average 32°F. The driest months are typically June and the wettest is October. Always check current conditions before visiting as mountain weather can change rapidly.
Is Glacier Bay National Park open year-round?
Glacier Bay National Park is typically open May - September. Winter months may bring road closures, limited facilities, and trail restrictions. Always check the official NPS website for current operating status and road conditions before planning your visit.
Continue Planning Your Trip
Glacier Bay National Park Guide
Trails, highlights, visitor tips, and everything you need to know.
Weather & Climate
Full 12-month weather data, charts, and packing recommendations.
Hotels Near Glacier Bay National Park
Nearby lodging from campgrounds and cabins to lodges and hotels.