🌤 Weather at Sullivan Island State Marine Park by season
| Spring | Summer | Fall | Winter |
|---|---|---|---|
| 24–59 °F | 48–65 °F | 25–56 °F | 18–32 °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 Haines #2, 19 mi away, elevation 95 ft. Conditions at the park can differ from the station, especially where elevation differs — check a forecast before you go.
The South End of Sullivan Island in Lynn Canal
Sullivan Island State Marine Park covers 2,720 acres at the south end of Sullivan Island in Lynn Canal, south of Chilkat Islands State Marine Park and 20 air miles south of Haines. The park is undeveloped.
Two bays on the east side of the island give access, but there are no anchorages. Alaska State Parks warns that weather and winds in Lynn Canal are unpredictable, which makes anchoring very difficult. Kayaks have the best chance, because they can be carried ashore. The beaches are rocky.
Things to Do
- Kayaking: the most practical way to land
- Fishing, boating and wildlife viewing: listed by Alaska State Parks
Park Information
| Feature | Details |
|---|---|
| Location | South end of Sullivan Island, Lynn Canal, 20 air miles south of Haines |
| Size | 2,720 acres |
| Access | No road access. Kayak or boat; no anchorages |
| Facilities | None (undeveloped). Rocky beaches |
| Fees | No entrance fee listed by Alaska State Parks (as of October 2026) |
| Accessibility | No accessibility information on the Alaska State Parks page |
| Managed By | Alaska Division of Parks and Outdoor Recreation |
| Coordinates | 58.9725, -135.3270 |
Getting There
Haines is the closest town, 20 air miles to the north. Land in one of the two bays on the east side of the island and pull your boat above the high-tide mark.
Nearby State Parks
All neighbors are reached by water, so the straight-line distances below are shorter than any boat route. Chilkat Islands State Marine Park lies about 5 miles northeast, Chilkat State Park about 10 miles north and Portage Cove State Recreation Site about 18 miles north.
Frequently Asked Questions
Where is Sullivan Island State Marine Park?
At the south end of Sullivan Island in Lynn Canal, 20 air miles south of Haines and south of Chilkat Islands State Marine Park.
Can you anchor at Sullivan Island?
Not reliably. Alaska State Parks says the two bays on the east side give access but are not anchorages, and Lynn Canal winds make anchoring very difficult.
Sources: Alaska State Parks, Sullivan Island State Marine Park. Last updated: October 2026.
Camping reservations: Camping at Sullivan Island State Marine Park cannot be booked online; Alaska State Parks lists no reservable sites for this park. Cabins and campsites that can be booked are listed at reservealaskastateparks.com. As of October 2026.
🐾 Dogs & Pets at Sullivan 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 Sullivan 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 Map
Plan your gear for Sullivan Island State Marine Park
From our editorial guides, matched to this park’s activities:
