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Nab Tower

The Nab Tower, located in the Solent in the United Kingdom, holds historical significance as a tower originally planned for anti-submarine protection during World War I. After the war, it was sunk over the Nab rocks east of the Isle of Wight, replacing a lightship. Divers and sailors recognize the Nab Tower as a prominent landmark, serving as a guide for the deep-water eastern entry into the Solent. With a maximum depth of approximately 20m, it offers a unique diving experience.

Diving near the Nab Tower will allow you to encounter diverse marine life, including Edible Crabs, Lobsters, Wrasse, Bib, Blennies, and Gobies. Venturing away from the Tower may even lead you to spot Cat-Sharks. This circular structure can be dived at any state of the tide, following the wall closely. However, it's advised to plan your dive when low currents are expected, as the tide direction rotates. This consideration ensures the peace of mind of the Skippers, especially due to the proximity to shipping lanes.

Referred to as a wedding cake because of its descending profile in expanding layers, the Nab Tower offers varying visibility depending on its position in the middle of the Solent. However, generally, you can expect good visibility ranging from 5-6m. While there are rumors of wrecks around the base, including a submarine, our dives on the N/NE side haven't presented any evidence of these claims.

With a maximum depth of 21m, the Nab Tower welcomes divers of all levels, from beginners to advanced. Its location in England, United Kingdom makes it easily accessible, offering an exciting diving opportunity in the waters of the Solent.

Diving Conditions Score for Nab Tower

5.5
Average

Average conditions, be alert.
The score is based on a calculation of the current weather and sea conditions.

Dive Site Overview for Nab Tower

Depth

21m

Visibility

1m

Experience Level

beginner
advanced

Weather Conditions for Nab Tower

Wave Height

1.02m

Wind Speed

22.3 m/s

Water Temp

18.5°C

Visibility

32.64km

Cloud Cover

0%

Wave Period

4.2s

Air Temperature

19.8°C

Precipitation

0 mm

Detailed 7-Day Diving Forecast for Nab Tower
Alpha

Dive Score Chart for Nab Tower

Best time to dive: 10:00 with score 6.9078333333333335/10. Water conditions: Waves 0.76m, Wind 24.5 m/s.Best night dive time: 3:00 with score 6.086666666666666/10.

Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.

Sunrise at Nab Tower: 06:00
Sunset at Nab Tower: 18:00

Optimal diving conditions at Nab Tower are affected by daylight hours. Sunrise occurs at 06:00 and sunset at 18:00, which impacts visibility and water temperature for scuba diving and snorkeling.

🌞
Best Overall
10:00

Score: 6.9/10
Waves: 0.76m (3.8s), Wind: 24.5 m/s

🌙
Best Night
3:00

Score: 6.1/10
Waves: 0.7m, Wind: 21.2 m/s

Seasonal Analysis for Nab Tower
Alpha

Historical patterns and best seasons for diving at Nab Tower

The dive score combines all factors to rate overall diving conditions throughout the year. Higher scores indicate better diving conditions.

Monthly Dive Score Analysis - Seasonal Diving Conditions

Higher values indicate better diving conditions

Seasonal DiveScore Chart

This chart displays monthly diveScore data throughout the year, showing seasonal patterns. The data is presented as a bar chart with an overlaid line graph.Dive scores range from 1 to 10, with 10 being optimal conditions.

Higher values indicate better diving conditions

Best Season for Nab Tower

Winter

Avg. Score: 10.0/10

Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.

Best Months for Nab Tower

January
Score: 10.0
February
Score: 10.0
December
Score: 9.9

Ideal Conditions for Nab Tower

Water Temp

Thermometer Emoji

25.1°C / 77.2°F

June

Visibility

Telescope Emoji

20.1m / 65.9ft

October

Wave Height

Wave Emoji

0.2m / 0.7ft

January

Wave Period

Wave Emoji

8.0s

January

Seasonal Insights for Nab Tower

Nab Tower shows typical northern hemisphere patterns with June being the warmest month (25.1°C) and December the coldest (21.1°C). The calmest conditions typically occur in January with average wave heights of 0.2m and wave periods of 8.0s. The most comfortable wave conditions are in January with a low wave steepness ratio, creating gentler swells. January offers the longest wave periods (8.0s), creating more comfortable and predictable conditions for boat entries and exits. Ocean currents are slowest in January (0.5m/s) and strongest in January (0.5m/s). January is usually the driest month with 0.0mm of precipitation. For beginners, the best time to visit would be during January to March, when ocean conditions are calmer with long-period waves and currents are typically weaker. Experienced divers might enjoy the challenges and potentially better visibility during the shoulder seasons, with moderate currents that can improve marine life encounters.

Scoring Legend:
9-10 (Excellent)
7-8 (Good)
5-6 (Average)
3-4 (Poor)
1-2 (Dangerous)

Last updated: 1 min. ago - Jun 22, 2026

Note: This dive site is not a verified dive site. Please dive with caution. This dive site might have incorrect information by the community.

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