Seawall Campground
Acadia National Park · Maine · 178 sites
Photos: Acadia National Park via Recreation.gov
Overview
Seawall Campground is a National Park Service campground in Acadia National Park, Maine, with 178 sites in 7 loops. Very shady: nearly every site is under trees. AT&T reports coverage at every site; Verizon at 154 of 178; T-Mobile reports none.
169 of 178 sites shaded
5 of 178 sites in full sun
14 of 178 sites with clear sky
Map of the campground
Every site from the Recreation.gov listing. Choose a layer to see it across the campground; tap a site to open it in Roam.
Layers
More in Roam Premium
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Questions
Which sites at Seawall Campground are the shadiest?
Nearly all of them. 169 of 178 sites at Seawall Campground have good shade from the trees, including from the hot afternoon sun.
See the tree canopy in RoamWhich sites at Seawall Campground get the most sun?
Only a few. 5 of 178 sites are truly sunny and 5 more get some sun; the rest are shaded.
See the tree canopy in RoamWill Starlink work at Seawall Campground?
Only at a few. About 14 of 178 sites have a clear gap in the trees for Starlink and 17 a partial one; most sit under tall trees. Satellite texting on a phone needs less open sky, but still works best from the most open spot you can find. This is our estimate from tree heights — check with the Starlink app's obstruction check when you arrive.
See the tree canopy in RoamWhich sites at Seawall Campground are the most level?
51 of 178 sites are flat, and 66 more have a gentle slope most RVs can level with blocks; 61 are steeper, better for tents. Sites that take RVs or trailers fit rigs up to 35 ft.
See the slope at each site in RoamDoes Seawall Campground have cell service?
Mostly. AT&T reports coverage at every site; Verizon at 154 of 178; T-Mobile reports none. That's the coverage each carrier reports to the FCC, not a measured signal, so under trees or below a ridge it can be weaker.
See the coverage map in RoamWhat’s the weather like at Seawall Campground in October?
In October, expect highs around 56°F and lows around 42°F, with about 5.4 inches of rain over the month. Every month’s averages are in Roam Premium.
Open Seawall in RoamCampground facts
- Sites
- 178 in 7 loops
- Kinds
- 53 for RVs or trailers · 120 tent-only · 5 group sites
- Hookups
- None
- Longest rig
- 35 ft
- Accessible
- 9 sites
- Elevation
- 15–57 ft
- Every site
- Picnic table · Pets allowed · Campfires allowed · Check-in 12 PM, check-out 10 AM
- Managed by
- National Park Service
- Booking
- Reserve on Recreation.gov
How we know Sources and limits
Shade, sun and Starlink are our estimates from Meta and the World Resources Institute’s canopy-height model (about 2 m pixels, from satellite imagery calibrated with space lidar; CC BY 4.0). From 2 m above each site we trace 72 lines out to 60 m and note the tallest tree in each direction. Shade counts trees overhead, the canopy within 30 m and how much of the afternoon sky is blocked. Sun counts how open the southern sky is. Starlink needs open sky above 35°, with the northern half counted twice because US dishes tilt north, and we keep the best spot within 8 m of the site’s post. The model sees tree heights only, not trunks, buildings or hills, so check with the Starlink app when you arrive.
Slope is the ground at each site’s post over about 4 m, from USGS 3DEP 1 m lidar: level under 2%, gentle to 4% (most rigs level on blocks), sloped to 8% (fine for a tent), steep beyond.
Cell coverage is from the FCC Broadband Data Collection (carrier filings as downloaded May 2026): each site is tested against each carrier’s modelled outdoor 4G/5G coverage. It is what the carriers report, not a measured signal.
Weather is NOAA’s 1991–2020 climate normals for the campground. Sites and facts are from Recreation.gov’s open data (July 2026). Map imagery: USGS The National Map. Photos: Recreation.gov.
From the campground’s Recreation.gov listing: “The majority of this family-oriented campground's sites are for small and large tents; some sites can accommodate RVs up to 35 ft. in length. Maneuvering RVs in the campground can be very difficult. Seawall Campground was not designed to accomodate large RVs and trailers. Please read campsite details and warnings carefully before reserving a site. Accommodations cannot be made for RVs or trailers that do not fit in reserved sites. Flush toilets, running water and a dump station are provided, as are picnic tables and fire rings. Roads are paved. A picnic area is located on the shore across from the campground entrance. Southwest Harbor is located on the west side of Mount Desert Island. The west side of the Island is considered the "quiet side" of Mount Desert Island. All the sites at Seawall Campground are wooded and within a 10-minute walk to the ocean. There are many beautiful and quiet hiking trails on this side of the Island, as well as Echo Lake, a wonderful lake for swimming, fishing, canoeing, kayaking and picnics. Acadia is comprised of a cluster of islands on the Atlantic coast of Maine.”
Page data as of October 15, 2026. Full source notes are in each layer’s info in the app.