Denmark

Hesselø

5–30 mMax Depth

3Species

Conditions Summary

Model forecast · local time (GMT+2)

Model conditions signal91/100

Waves

0.6 m

3.0 s

Swell

0.0 m

3.5 s

Current speed

0.7 km/h

flowing toward W

Water temperature

12.5°C

Wind

30.2 km/h

→ E

Sea level

-0.2 m

falling

WavesWatch

SwellCalm

Current speedCalm

Planning window

06:30–06:00

Calmest model window

Forecast Overview

Tue, Oct 20Watch

Waves0.5–0.9 mCurrent speed1.0 km/h maxWater temperature12.5°C

TodayCalm

Waves0.4–0.7 mCurrent speed0.8 km/h maxWater temperature12.4°C

TomorrowCalm

Waves0.2–0.6 mCurrent speed0.6 km/h maxWater temperature12.4°C

Fri, Oct 23Calm

Waves0.3–0.4 mCurrent speed0.6 km/h maxWater temperature12.4°C

Next 72 hours

06:00

Waves: 0.5 m

Current speed: 0.7 km/h

Water temperature: 12.5°C

12:00

Waves: 0.7 m

Current speed: 0.8 km/h

Water temperature: 12.5°C

18:00

Waves: 0.9 m

Current speed: 0.9 km/h

Water temperature: 12.5°C

00:00

Waves: 0.7 m

Current speed: 0.8 km/h

Water temperature: 12.4°C

06:00

Waves: 0.5 m

Current speed: 0.4 km/h

Water temperature: 12.4°C

12:00

Waves: 0.4 m

Current speed: 0.6 km/h

Water temperature: 12.5°C

18:00

Waves: 0.5 m

Current speed: 0.0 km/h

Water temperature: 12.5°C

00:00

Waves: 0.4 m

Current speed: 0.5 km/h

Water temperature: 12.4°C

06:00

Waves: 0.2 m

Current speed: 0.4 km/h

Water temperature: 12.3°C

12:00

Waves: 0.5 m

Current speed: 0.6 km/h

Water temperature: 12.4°C

18:00

Waves: 0.6 m

Current speed: 0.3 km/h

Water temperature: 12.5°C

00:00

Waves: 0.4 m

Current speed: 0.6 km/h

Water temperature: 12.4°C

Catalog depth5–30 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

May-Sep

Peak month

Aug 18.4°

Jan3.0°

Feb2.2°

Mar3.1°

Apr6.4°

May11.1°

Jun15.1°

Jul17.8°

Aug18.4°

Sep15.6°

Oct11.8°

Nov8.2°

Dec5.0°

Current: moderate

Typical visibility: 7 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

brackish 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

Lined polycera sea slug

Polycera quadrilineata

DeepLog1

Rim-backed nudibranch

Palio dubia

DeepLog1

Rough doris

Onchidoris muricata

DeepLog1

Kurtiella bidentata

Nearby OBIS observations14

Scoloplos armiger

Nearby OBIS observations14

Nucula nitidosa

Nearby OBIS observations10

Ophelia borealis

Nearby OBIS observations10

Phoronis muelleri

Nearby OBIS observations10

Nemertea

Nearby OBIS observations9

Rhodine gracilior

Nearby OBIS observations9

Arctica islandica

Nearby OBIS observations8

Nephtys longosetosa

Nearby OBIS observations8

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

DeepLog + OBIS →

Photos