12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
Old Harry Rocks scuba diving weather
Boat dive · Swanage, Dorset · Show on map
Hour by hour today
Tap an hour to see it above
| Time | Score | Waves | Wind (gusts) | Current | Swell | Tide | Water | Air | Rain | Limited by |
|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 m | 11 (14 kn) ↓ | 1.7 kn | 0.3 m · 5 s ↓ | ↓ falling | 13.6 °C | 11 °C | – | current | ||
| 0.5 m | 12 (17 kn) ↓ | 2.1 kn | 0.3 m · 6 s ↓ | ↓ falling | 13.5 °C | 11 °C | – | current | ||
| 0.5 m | 12 (16 kn) ↓ | 1.8 kn | 0.1 m · 7 s ↓ | ↓ falling | 13.5 °C | 11 °C | – | current | ||
| 0.5 m | 13 (18 kn) ↓ | 1.2 kn | 0.1 m · 9 s ↓ | Low ~18:20 | 13.5 °C | 11 °C | – | current | ||
| 0.6 m | 15 (20 kn) ↓ | 0.4 kn | 0.1 m · 9 s ↓ | ↑ rising | 13.5 °C | 11 °C | – | wind | ||
| 0.6 m | 15 (21 kn) ↓ | 0.8 kn | 0.1 m · 10 s ↓ | ↑ rising | 13.5 °C | 12 °C | – | wind | ||
| 0.7 m | 16 (21 kn) ↓ | 1.5 kn | 0.1 m · 9 s ↓ | High ~21:35 | 13.5 °C | 12 °C | – | current |
Waves and swell are adjusted for this site's shelter from the coastline. Arrows point where the wind and swell go. Night hours are shaded. Tide times come from an ocean model: usually within about half an hour, more in complex waters. Check official tide tables.
Water at depth
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. High confidence.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Medium confidence.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Medium confidence.
13 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
12 °C down to about 10 m. The model's water ends there; nothing is known below.
Suit: 7 mm with hood, or drysuit down to ~10 m.
Model estimate (Copernicus Marine), updated Sat 14 Nov. Trend only.
Temperature profile and next days
| Day | Surface | Warm to |
|---|---|---|
| Sat 14 Nov | 12.2 °C | ~10 m |
| Sun 15 Nov | 12.2 °C | ~10 m |
| Mon 16 Nov | 12.2 °C | ~10 m |
| Tue 17 Nov | 12.3 °C | ~10 m |
| Wed 18 Nov | 12.4 °C | ~10 m |
| Thu 19 Nov | 12.5 °C | ~10 m |
| Fri 20 Nov | 12.2 °C | ~10 m |
| Sat 21 Nov | 12.2 °C | ~10 m |
| Sun 22 Nov | 12.2 °C | ~10 m |
| Mon 23 Nov | 12.1 °C | ~10 m |
~9 km model grid; nearest model water 3.8 km away, so channels and bays may differ. Daily averages; the thermocline can move several metres day to day.
Conditions at Old Harry Rocks
Old Harry Rocks is open to the sea from the ENE–SSW, so waves build there when the wind blows from those directions. Land shelters it from the SW–WNW.
Over the next 7 days it's good or better every day. Thu and Fri are only a trend so far.
When it's rough here, try Kimmeridge Bay (16 km, sheltered from the ENE–SE).
The water is 14 °C at the surface and stays warm past 10 m, so a 7 mm with hood, or drysuit suits most dives.
Shelter
Open to ENE–SSW. Waves and swell from there reach the site.
Sheltered from SW–WNW: land blocks the waves.
Computed from the OpenStreetMap coastline. Wind itself is not reduced by shelter.
Location
Open Old Harry Rocks on the map50.6420, -1.9200Nearby dive sites
- 50SS KyarraFair
- 10Kimmeridge BayNo-go
- 74HMS Pomone (Needles protected wreck)Good
- 39Countess of ErnePoor
- 47The DredgerFair
Scores are today's best daylight hour.
About this forecast
Updated Sat 14 Nov, 15:30 · weather run 06Z 14 Nov · waves run 00Z 14 Nov
Waves are adjusted for this site's shelter from the coastline.
Tides come from a coarse ocean model. The range, and whether tides are bigger or smaller this week, are about right. Times are usually within about half an hour, but complex tides (the Solent, Portland, narrow straits) are poor. Slack water isn't in the score yet: plan with official tide tables and local advice.
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