Maritime signal tower

Portland Observatory

About 0.3 mile uphill

Portland Observatory is an 1807 octagonal maritime signal tower operated by Greater Portland Landmarks, offering seasonal guided and self-guided climbs over seven stories to a Casco Bay viewpoint.

The place

About Portland Observatory

Captain Lemuel Moody built the 86-foot Portland Observatory in 1807 as a commercial communication station. From the tower he could identify incoming ships and signal subscribing merchants before vessels reached the docks.

The operator emphasizes that this is not a lighthouse. It is the country’s last surviving historic maritime signal tower and holds National Historic Landmark and National Civil Engineering Landmark recognition.

A standard guided visit is described as about 45 minutes and includes seven stories and 104 stairs. Seasonal self-guided blocks let visitors move at their own pace, but they do not remove the climb or mobility limitation.

The City of Portland owns the tower and local nonprofit Greater Portland Landmarks operates it. The current page publishes a May 23–October 12 season, extended Thursday–Saturday summer hours, in-person admission, and direct Observatory phone and email contacts.

What stands out

A working idea, not a lighthouse

Learn how signal flags and a telescope gave merchants advance notice of arriving ships before two-way radio.

Seven-story viewpoint

Reach a Casco Bay panorama after a 104-stair climb, weather and visibility permitting.

Guided interpretation

Docents connect Captain Moody, the port economy, the tower’s construction, and overlooked waterfront histories.

Local preservation

Admission supports Greater Portland Landmarks’ operation of a City-owned National Historic Landmark.

Pair it with the train

Why it belongs in a Maine Narrow Gauge Railroad Co. & Museum trip

Maine Narrow Gauge’s narration introduces Portland and Casco Bay from the two-foot railroad; this stop extends that story on foot without substituting a generic chain or a distant regional attraction. The Observatory explains how Portland’s harbor was watched and managed before radio, then gives a high view over Casco Bay, islands, and waterfront landmarks that appear in the train narration.

Before you go

Plan your visit

  • SeasonCurrent page: May 23–October 12; seven days a week within the published season.
  • HoursMay 23–31 and Sep 1–Oct 12: 10 a.m.–3:30 p.m.; Jun 1–Aug 31: Sun–Wed 10–3:30, Thu–Sat 10–7.
  • AdmissionPublished walk-up prices: $10 adult; $8 senior, military, or student; $5 ages 6–16; under 6 free; Portland-resident discounts.
  • Tour lengthGuided interpretation is described as about 45 minutes; guided and self-guided blocks differ by weekday, weekend, and summer evening.
  • StairsSeven stories and 104 stairs. The historic tower is not accessible to guests with limited mobility.
  • TicketsPersonal visits use in-person admission during open hours; gift vouchers do not reserve a tour place.
  • GroupsLarge groups should contact the published group coordinator rather than arriving as an ordinary walk-up party.
  • Walk from trainThe straight-line distance is about 0.3 mile, but the route climbs from the waterfront to Munjoy Hill.

Add Portland history

Add Wadsworth-Longfellow House

Continue from maritime commerce and harbor signals into a downtown family house and Maine history campus.

View the guide →

Useful answers

Frequently asked questions

Is the Portland Observatory a lighthouse?

No. It was a maritime signal tower used to identify arriving vessels and notify subscribing merchants.

How many stairs are there?

The official page publishes seven stories and 104 stairs to the top.

Is the Observatory wheelchair accessible?

No. Greater Portland Landmarks identifies the Observatory as a historic space that is not accessible to guests with limited mobility.

Do I need advance tickets?

The current page publishes in-person admission during open hours. Gift vouchers are not reservations; groups should contact the operator.

How long should I allow?

The standard guided tour is described as about 45 minutes, plus the uphill walk from the waterfront and any wait for the next tour.

When is it open?

The current published season is May 23 through October 12, with longer Thursday–Saturday hours in June, July, and August. Recheck before travel.

Trust and accuracy

Sources

Source checked 2026-08-14. This free guide has not yet been confirmed by the venue. Current hours, prices, services, and accessibility can change; confirm time-sensitive details directly.