United States

Boston Harbor

5–25 mMax Depth

boatEntry

19Species

Conditions Summary

Model forecast · local time (GMT-4)

Model conditions signal100/100

Waves

0.3 m

5.6 s

Swell

0.2 m

4.5 s

Current speed

0.4 km/h

flowing toward SW

Water temperature

14.3°C

Wind

3.3 km/h

→ NW

Sea level

-0.7 m

rising

WavesCalm

SwellCalm

Current speedCalm

Planning window

13:30–13:00

Calmest model window

Forecast Overview

Sun, Oct 18Calm

Waves0.2–0.3 mCurrent speed0.4 km/h maxWater temperature14.2°C

Mon, Oct 19Calm

Waves0.2–0.7 mCurrent speed0.6 km/h maxWater temperature14.0°C

Tue, Oct 20Challenging

Waves0.7–1.2 mCurrent speed0.5 km/h maxWater temperature13.8°C

TodayChallenging

Waves1.2–1.4 mCurrent speed0.6 km/h maxWater temperature13.6°C

Next 72 hours

13:00

Waves: 0.3 m

Current speed: 0.3 km/h

Water temperature: 14.3°C

19:00

Waves: 0.2 m

Current speed: 0.2 km/h

Water temperature: 14.2°C

01:00

Waves: 0.2 m

Current speed: 0.3 km/h

Water temperature: 14.0°C

07:00

Waves: 0.3 m

Current speed: 0.0 km/h

Water temperature: 13.9°C

13:00

Waves: 0.4 m

Current speed: 0.2 km/h

Water temperature: 14.0°C

19:00

Waves: 0.6 m

Current speed: 0.3 km/h

Water temperature: 14.0°C

01:00

Waves: 0.7 m

Current speed: 0.2 km/h

Water temperature: 13.9°C

07:00

Waves: 0.8 m

Current speed: 0.4 km/h

Water temperature: 13.8°C

13:00

Waves: 1.1 m

Current speed: 0.4 km/h

Water temperature: 13.9°C

19:00

Waves: 1.0 m

Current speed: 0.3 km/h

Water temperature: 13.8°C

01:00

Waves: 1.3 m

Current speed: 0.3 km/h

Water temperature: 13.7°C

07:00

Waves: 1.3 m

Current speed: 0.3 km/h

Water temperature: 13.5°C

Catalog depth5–25 m

Data sources & field guideOpen-Meteo Marine + Weather APIs

Planning context, not a safety guarantee. Coastal model accuracy is limited. Confirm the actual briefing, entry, exit, and suitability with a local operator.

Open-Meteo Marine + Weather APIs →

Dive readiness

Collecting the latest marine conditions and forecast signals.

Seasons · water temperature

12-month outlook

Best window

Not available

Peak month

Aug 18.8°

Jan4.9°

Feb3.3°

Mar3.5°

Apr5.8°

May10.1°

Jun14.7°

Jul18.2°

Aug18.8°

Sep17.0°

Oct13.5°

Nov10.2°

Dec7.5°

Current: moderate

Typical visibility: 8 m

Historical planning data from the recorded site profile. Water temperature and conditions can vary by day, depth, and weather; confirm current conditions with a local operator.

Explore nearby centers on the map

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Dive Types

salt Waterintermediate Difficulty

Questions to ask a local operator

What are today's current, visibility, entry, and exit conditions?
Does the planned route stay within my certification and recent experience?
Are there local permits, conservation rules, or equipment requirements?

Common Species

12 km · nearby observations

Common periwinkle

Littorina littorea

DeepLog8

Native oyster

Ostrea edulis

DeepLog8

Slipper limpet

Crepidula fornicata

DeepLog5

Atlantic razor clam

Ensis leei

DeepLog4

Blue mussel

Mytilus edulis

DeepLog4

Striped bass

Morone saxatilis

DeepLog4

Surfclam

Spisula solidissima

DeepLog3

Common seal

Phoca vitulina

DeepLog2

Mexican scallop

Argopecten irradians

DeepLog2

Northern dog whelk

Nucella lapillus

DeepLog2

Common jingle

Anomia simplex

DeepLog1

Eel-grass

Zostera marina

DeepLog1

These are nearby biodiversity records, not a guarantee that every species will be seen on a particular dive.

DeepLog + OBIS →

Photos