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Shore entry

Plum Cove

Massachusetts, United StatesDirections
Open Water suggestedVery shallow (10-20 ft)3–6 m (10–20 ft) depthShore entry7mm or semi-dry + hood typical

Plum Cove at a glance

Plum Cove is a shore dive site in Massachusetts, United States with depths of 3–6.1 m (10–20 ft). Typically most favorable Jul · from 3 years of archive data. Divers commonly see Winter flounder, American lobster, and Longfin squid. Recent reports put the water around 14°C (56°F). Check the latest conditions and entry details before you go.

Favorable window now· until 20:00 · sunset 17:43

Forecast for this hour · 16:00 · run 15 h ago
0.4 m (1.2 ft)waves — under half a meter expected (waves — about a foot expected)

Tap a factor for its source and model point · Forecast 14°C · seasonal avg 15°C ( · Forecast 56°F · seasonal avg 59°F)

Site hazards: Very shallow (10-20 ft)

Read the full hazards ↓

Dive windows this week

Smallest waves: Sat
Mon2:00–20:00 favorable

0.4 m waves · 6 kn wind (1.3 ft waves · 6 kn wind)

Tue8:00–21:00 favorable

0.6 m waves · 6 kn wind (1.9 ft waves · 6 kn wind)

WedNo window

0.4 m waves · 5 kn wind (1.1 ft waves · 5 kn wind)

Thu8:00–18:00 favorable

0.4 m waves · 11 kn wind (1.2 ft waves · 11 kn wind)

Fri8:00–18:00 favorable, 20:00–0:00 favorable

0.3 m waves · 12 kn wind (0.9 ft waves · 12 kn wind)

Sat8:00–0:00 favorable

0.2 m waves · 7 kn wind (0.5 ft waves · 7 kn wind)

Sun8:00–19:00 favorable

0.3 m waves · 9 kn wind (0.9 ft waves · 9 kn wind)

Favorable windowModerate window— no window

Every forecast dive window each day, site-local time, from wave and wind forecasts. Numbers under each bar are daylight averages.

First light 6:40 · Sunrise 7:09 · Sunset 17:43 · some windows run past sunset

Source: Open-Meteo marine · model point 2.1 km from site · updated 26 Oct, 01:26 GMT-4

Forecast only — always assess conditions on site.

Compare this weekend’s windows near Plum Cove

Forecast · NOAA tide model

Tide & slack timing

Loading tide predictions

Recent diver reports

Dated firsthand observations from divers — not current conditions.

No diver reports for this site yet. — one dated observation helps every diver after you.

Dived here today — did the forecast match?

What Divers Say

Known for: Winter flounder, American lobster, Green crab
Best time: May-October; good when other north-shore sites are blown out, and a relaxed pick for night dives and new divers. Weekday mornings avoid both crowds and parking enforcement.

Based on community reviews and site data. Conditions vary — always verify before diving.

Best months, historically

What conditions have historically been typical at this site, month by month — not a forecast.

  1. January, 34% of days have historically been favorable, water has typically been 6°C (43°F), waves have typically been 1.5 m (4.8 ft), wind has typically been 23 knots
  2. February, 36% of days have historically been favorable, water has typically been 5°C (40°F), waves have typically been 1.4 m (4.6 ft), wind has typically been 22 knots
  3. March, 35% of days have historically been favorable, water has typically been 5°C (40°F), waves have typically been 1.6 m (5.1 ft), wind has typically been 22 knots
  4. April, 59% of days have historically been favorable, water has typically been 7°C (44°F), waves have typically been 1.2 m (3.9 ft), wind has typically been 19 knots
  5. May, 70% of days have historically been favorable, water has typically been 11°C (52°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 18 knots
  6. June, 82% of days have historically been favorable, water has typically been 16°C (61°F), waves have typically been 0.8 m (2.6 ft), wind has typically been 16 knots
  7. July, 90% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 0.7 m (2.4 ft), wind has typically been 16 knots, historically most favorable
  8. August, 85% of days have historically been favorable, water has typically been 19°C (67°F), waves have typically been 0.8 m (2.7 ft), wind has typically been 15 knots
  9. September, 77% of days have historically been favorable, water has typically been 19°C (66°F), waves have typically been 1.1 m (3.6 ft), wind has typically been 16 knots
  10. October, 58% of days have historically been favorable, water has typically been 15°C (59°F), waves have typically been 1.3 m (4.3 ft), wind has typically been 19 knots
  11. November, 43% of days have historically been favorable, water has typically been 12°C (53°F), waves have typically been 1.2 m (4.0 ft), wind has typically been 21 knots
  12. December, 38% of days have historically been favorable, water has typically been 8°C (47°F), waves have typically been 1.4 m (4.5 ft), wind has typically been 22 knots

July has typically had the largest share of favorable days here. Conditions vary year to year — this is historical context, not a forecast.

Based on 3 years of archive data. Bar height shows the share of days each month whose conditions have historically scored favorably.

Marine life seen at this site

Species noted at this site — not a promise of what you’ll encounter.

Species seen here

Rough labels: “Commonly seen” usually means two or more recorded sightings near this site in public dive logs (GBIF), “Occasionally seen” one; “Seasonal” and “Rarely seen” come from dive-guide research. Not a measured rate.

Fills & rentals nearby

Facts from OpenStreetMap, corrected by the community — listed by distance only. Details change; confirm with the shop.

Shop facts come from OpenStreetMap and community corrections, shown nearest first. PickADive lists facts and contacts only — no listing is sponsored or ranked.

Data updated July 2026

Site details

Plum Cove is a small, well-protected neighborhood beach in the Lanesville section of Gloucester with clear, shallow water of 10-20 ft and one of the easiest entries on Cape Ann. A small rocky reef lies just outside the cove off the right-hand point, and the sheltered, gradually sloping bottom makes it a favorite for training, night dives and bail-out days. The main constraint is summer parking, which is restricted to Gloucester beach-sticker holders during the day.

reefshore

Very shallow (10-20 ft) — watch for swimmers and snorkelers in summer; cold water; minor boat traffic near the small reef off the right point. One of the most benign sites on Cape Ann.

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