🌤 Weather at Grindall Island State Marine Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 32–58 °F | 48–65 °F | 35–59 °F | 31–41 °F |
Each range runs from the coldest monthly average low to the warmest monthly average high in that season (1991-2020 climate normals), measured at Ketchikan 10N, 12 mi away, elevation 295 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
🏆 Clarence Strait Marine — Island marine park in Clarence Strait near Ketchikan with old-growth rainforest
Grindall Island State Marine Park protects Grindall Island in Clarence Strait near Ketchikan. The island features old-growth Sitka spruce and western hemlock rainforest, sheltered coves for anchoring, and excellent fishing. The waters around the island are frequented by humpback whales, orcas, and Steller sea lions. Ancient Tlingit cultural sites are present on the island.
Visitor Information
| Detail | Information |
|---|---|
| Location | Clarence Strait, near Ketchikan, AK |
| Access | Boat only |
| Entry Fee | Free |
| Wildlife | Whales, orcas, sea lions |
Frequently Asked Questions
Are there cultural sites?
Yes — Tlingit cultural sites are present. Treat all cultural resources with respect. Do not disturb artifacts or structures.
How much does it rain in Southeast Alaska?
Ketchikan (nearest city) averages 150 inches of rain annually — making it the wettest city in the US. Rain gear, waterproof bags, and a positive attitude about moisture are essential for any Southeast Alaska visit.
More parks nearby: Magoun Islands State Marine Park is a short drive away, while Totem Bight State Park lies a short drive away.
Camping reservations: Book campsites and cabins for Alaska state parks online at alaskastateparks.reserveamerica.com.
🐋 Visit Grindall Island SMP
Old-growth rainforest island — whales, orcas, and Tlingit heritage in Clarence Strait.
About Grindall Island
Grindall Island State Marine Park near Ketchikan protects a remote island in the Clarence Strait — the heart of Southeast Alaska’s Inside Passage. The island is covered in ancient Sitka spruce and western red cedar rainforest. The surrounding waters are frequented by humpback whales, orcas, and Steller sea lions.
Things to Do
Anchorage for boaters, beach camping in the temperate rainforest, whale watching, fishing for salmon and halibut, kayaking, and wildlife photography. Access by boat from Ketchikan.
Insider Tips
Southeast rainforest: Grindall Island is classic Tongass National Forest — towering Sitka spruce, western red cedar, and an understory of devil’s club and skunk cabbage. Pro tip: Rain gear is essential — Southeast Alaska receives 100-200 inches annually. Beachcombing: Japanese glass fishing floats occasionally wash ashore — a prized find.
Best Time to Visit
June-July: Longest days and “driest” weather (still expect rain). August-September: Salmon runs in nearby streams. May: Whale migration peaks. Winter: Extremely limited access due to storms.
🐾 Dogs & Pets at Grindall Island State Marine Park
- Pets allowed? statewide rule
- Pets are welcome in Alaska State Parks and campgrounds when leashed and accompanied by the owner; unleashed dogs are allowed in the backcountry if under voice control.
- Leash rule statewide rule
- Leash not exceeding 9 feet required in developed facilities (campgrounds, picnic areas, trailheads, swim beaches, boat ramps).
- Beaches & swim areas statewide rule
- No statewide pet ban on beaches; swim beaches count as developed facilities where the 9-foot leash rule applies.
- Statewide exceptions statewide rule
- In the backcountry leashes are not required but pets must remain under voice control; in trapping areas (e.g. Chena River SRA) leashing is strongly advised for dog safety.
Are dogs allowed at Grindall Island State Marine Park?
Pets are welcome in Alaska State Parks and campgrounds when leashed and accompanied by the owner; unleashed dogs are allowed in the backcountry if under voice control. Individual parks can post stricter rules — check signage on arrival.
Rules verified July 2026 via dnr.alaska.gov. More: Alaska state parks guide · Dog rules in all 50 states compared
Park Location
Plan your gear for Grindall Island State Marine Park
From our editorial guides, matched to this park’s activities:
