Netherlands

Middelharnis

5–20 mMax Depth

shoreEntry

1Species

Conditions Summary

Model forecast · local time (GMT+2)

Model conditions signal100/100

Waves

0.2 m

7.3 s

Swell

0.2 m

4.8 s

Current speed

0.2 km/h

flowing toward E

Water temperature

16.8°C

Wind

10.1 km/h

→ SE

Sea level

-0.6 m

rising

WavesCalm

SwellCalm

Current speedCalm

Planning window

06:00–07:00

Calmest model window

Forecast Overview

Mon, Oct 19Watch

Waves0.2–0.3 mCurrent speed3.2 km/h maxWater temperature16.9°C

Tue, Oct 20Calm

Waves0.2–0.4 mCurrent speed3.5 km/h maxWater temperature16.7°C

TodayWatch

Waves0.1–1.1 mCurrent speed3.4 km/h maxWater temperature16.5°C

TomorrowWatch

Waves0.9–1.0 mCurrent speed3.3 km/h maxWater temperature16.4°C

Next 72 hours

06:00

Waves: 0.2 m

Current speed: 0.2 km/h

Water temperature: 16.8°C

12:00

Waves: 0.2 m

Current speed: 0.9 km/h

Water temperature: 16.9°C

18:00

Waves: 0.2 m

Current speed: 0.6 km/h

Water temperature: 16.9°C

00:00

Waves: 0.3 m

Current speed: 0.9 km/h

Water temperature: 16.8°C

06:00

Waves: 0.3 m

Current speed: 0.6 km/h

Water temperature: 16.7°C

12:00

Waves: 0.4 m

Current speed: 1.2 km/h

Water temperature: 16.6°C

18:00

Waves: 0.3 m

Current speed: 1.0 km/h

Water temperature: 16.6°C

00:00

Waves: 0.2 m

Current speed: 1.2 km/h

Water temperature: 16.5°C

06:00

Waves: 0.5 m

Current speed: 0.9 km/h

Water temperature: 16.5°C

12:00

Waves: 0.5 m

Current speed: 0.6 km/h

Water temperature: 16.5°C

18:00

Waves: 0.7 m

Current speed: 0.5 km/h

Water temperature: 16.5°C

00:00

Waves: 1.0 m

Current speed: 0.4 km/h

Water temperature: 16.4°C

Catalog depth5–20 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

Apr-Oct

Peak month

Aug 18.7°

Jan6.5°

Feb5.8°

Mar6.3°

Apr8.5°

May11.5°

Jun14.6°

Jul17.2°

Aug18.7°

Sep17.7°

Oct15.0°

Nov11.6°

Dec8.5°

Current: mild

Typical visibility: 5 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

shoresalt Waterbeginner 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

Short snouted seahorse

Hippocampus hippocampus

DeepLog3

Ichthyaetus melanocephalus

Nearby OBIS observations36

Crepidula fornicata

Nearby OBIS observations10

Nephtys hombergii

Nearby OBIS observations9

Platalea leucorodia

Nearby OBIS observations8

Alitta succinea

Nearby OBIS observations7

Heteromastus filiformis

Nearby OBIS observations7

Kurtiella bidentata

Nearby OBIS observations7

Tritia reticulata

Nearby OBIS observations7

Capitella capitata

Nearby OBIS observations6

Larus argentatus

Nearby OBIS observations6

Littorina littorea

Nearby OBIS observations6

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

DeepLog + OBIS →

Photos