United States

Arch Reef

18–22 mMax Depth

boatEntry

6Species

Conditions Summary

Model forecast · local time (GMT-7)

Model conditions signal71/100

Waves

1.3 m

11.9 s

Swell

1.0 m

11.7 s

Current speed

0.4 km/h

flowing toward W

Water temperature

21.5°C

Wind

14.4 km/h

→ SW

Sea level

0.6 m

falling

WavesChallenging

SwellWatch

Current speedCalm

Forecast Overview

Tue, Oct 20Challenging

Waves1.3–1.3 mCurrent speed0.6 km/h maxWater temperature21.5°C

TodayChallenging

Waves1.3–1.4 mCurrent speed0.9 km/h maxWater temperature21.4°C

TomorrowChallenging

Waves1.3–1.5 mCurrent speed0.8 km/h maxWater temperature21.4°C

Fri, Oct 23Challenging

Waves1.3–1.6 mCurrent speed0.9 km/h maxWater temperature21.4°C

Next 72 hours

19:00

Waves: 1.3 m

Current speed: 0.4 km/h

Water temperature: 21.5°C

01:00

Waves: 1.3 m

Current speed: 0.8 km/h

Water temperature: 21.4°C

07:00

Waves: 1.4 m

Current speed: 0.9 km/h

Water temperature: 21.4°C

13:00

Waves: 1.4 m

Current speed: 0.7 km/h

Water temperature: 21.4°C

19:00

Waves: 1.4 m

Current speed: 0.5 km/h

Water temperature: 21.5°C

01:00

Waves: 1.4 m

Current speed: 0.6 km/h

Water temperature: 21.4°C

07:00

Waves: 1.3 m

Current speed: 0.8 km/h

Water temperature: 21.4°C

13:00

Waves: 1.3 m

Current speed: 0.2 km/h

Water temperature: 21.5°C

19:00

Waves: 1.3 m

Current speed: 0.4 km/h

Water temperature: 21.5°C

01:00

Waves: 1.5 m

Current speed: 0.6 km/h

Water temperature: 21.4°C

07:00

Waves: 1.4 m

Current speed: 0.9 km/h

Water temperature: 21.4°C

13:00

Waves: 1.3 m

Current speed: 0.5 km/h

Water temperature: 21.5°C

Catalog depth18–22 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

Jul-Nov

Peak month

Aug 19.6°

Jan14.7°

Feb14.6°

Mar14.7°

Apr14.9°

May15.9°

Jun17.2°

Jul18.8°

Aug19.6°

Sep19.3°

Oct18.5°

Nov16.9°

Dec15.3°

Current: mild

Typical visibility: 20 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 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

California sea lion

Zalophus californianus

DeepLog2

Crested goby

Rhinogobiops nicholsii

DeepLog2

Bat star

Patiria miniata

DeepLog1

California sheephead

Bodianus pulcher

DeepLog1

Northern elephant seal

Mirounga angustirostris

DeepLog1

Pacific ancula

Ancula pacifica

DeepLog1

Gopher, Copper Rockfish Young Of Year

Sebastes

Nearby OBIS observations10

Sardines And Anchovies

Clupeiformes

Nearby OBIS observations8

Striped Surfperch

Embiotoca lateralis

Nearby OBIS observations8

Shiner Surfperch

Cymatogaster aggregata

Nearby OBIS observations7

Honeycomb Rockfish

Sebastes umbrosus

Nearby OBIS observations6

Rock Greenling

Hexagrammos lagocephalus

Nearby OBIS observations5

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

DeepLog + OBIS →

Photos