United States

Half Moon Underwater Archaeological Preserve

3–12 mMax Depth

boatEntry

42Species

Conditions Summary

Model forecast · local time (GMT-4)

Planning signal100/100

Waves

0.2 m

3.9 s

Swell

0.2 m

3.0 s

Current speed

0.6 km/h

flowing toward SE

Water temperature

31.9°C

Wind

22.2 km/h

→ N

Sea level

-0.4 m

falling

WavesCalm

SwellCalm

Current speedCalm

Planning window

20:30–20:00

Calmest model window

Forecast Overview

Sat, Sep 5Calm

Waves0.2–0.2 mCurrent speed0.6 km/h maxWater temperature31.9°C

TodayCalm

Waves0.1–0.2 mCurrent speed0.6 km/h maxWater temperature31.8°C

TomorrowCalm

Waves0.1–0.1 mCurrent speed0.8 km/h maxWater temperature31.7°C

Tue, Sep 8Calm

Waves0.1–0.1 mCurrent speed0.9 km/h maxWater temperature31.6°C

Next 72 hours

20:00

Waves: 0.2 m

Current speed: 0.6 km/h

Water temperature: 31.9°C

02:00

Waves: 0.2 m

Current speed: 0.4 km/h

Water temperature: 31.8°C

08:00

Waves: 0.2 m

Current speed: 0.5 km/h

Water temperature: 31.6°C

14:00

Waves: 0.2 m

Current speed: 0.6 km/h

Water temperature: 31.9°C

20:00

Waves: 0.1 m

Current speed: 0.5 km/h

Water temperature: 31.9°C

02:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.7°C

08:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.5°C

14:00

Waves: 0.1 m

Current speed: 0.6 km/h

Water temperature: 31.8°C

20:00

Waves: 0.1 m

Current speed: 0.4 km/h

Water temperature: 31.7°C

02:00

Waves: 0.1 m

Current speed: 0.2 km/h

Water temperature: 31.5°C

08:00

Waves: 0.1 m

Current speed: 0.3 km/h

Water temperature: 31.4°C

14:00

Waves: 0.1 m

Current speed: 0.3 km/h

Water temperature: 31.7°C

Catalog depth3–12 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

Nov-Apr

Peak month

Aug 29.7°

Jan24.7°

Feb24.6°

Mar24.9°

Apr25.8°

May27.0°

Jun28.4°

Jul29.2°

Aug29.7°

Sep29.3°

Oct28.3°

Nov26.9°

Dec25.7°

Current: mild

Typical visibility: 15 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

reefsalt Waterbeginner Difficulty

Data source & current conditions

Profile facts were imported from DeepLog. ScubaProof adds nearby-center links and presents the recorded fields without treating missing data as confirmation. Conditions, access, permits, and site suitability can change; confirm them with a local operator before diving.

View the source profile →

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

Chione elevata

DeepLog16

Buttonwood

Conocarpus erectus

DeepLog6

Broad ribbed cardita

Carditamera floridana

DeepLog5

Portuguese man o'war

Physalia physalis

DeepLog4

American starsnail

Lithopoma americanum

DeepLog3

Queen conch shell

Aliger gigas

DeepLog3

Red mangrove

Rhizophora mangle

DeepLog3

Sailfin mollie

Poecilia latipinna

DeepLog3

Sheepshead minnow

Cyprinodon variegatus

DeepLog3

Longspine starsnail

Lithopoma phoebium

DeepLog2

Plicate nerite

Nerita versicolor

DeepLog2

Ragged sea hare

Aplysia dactylomela

DeepLog2

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

DeepLog + OBIS →

Photos

Half Moon Underwater Archaeological Preserve photo 2

Half Moon Underwater Archaeological Preserve photo 3

Half Moon Underwater Archaeological Preserve photo 4