Nautilus Reef
Nautilus Reef, located just offshore from Ala Moana Beach on the island of Oahu, is a magnificent dive site formed by an ancient lava field. This unique reef offers a convenient boat dive, perfect for beginners, with the northwest side being shallower and gradually dropping off to a maximum depth of 13m on the south side.
Explore the vibrant underwater world of Nautilus Reef, teeming with a plethora of fish species, including triggerfish, butterflyfish, the stunning Moorish idols, and abundant urchins. If you're lucky, you may even encounter the majestic white tip reef shark seeking solace within the overhangs.
Enhance your diving experience with excellent visibility of up to 14m, allowing you to revel in the beauty of this underwater paradise. Situated near Kewalo Marine Laboratory in the captivating Kaka‘ako Waterfront area of Honolulu, Hawaii, Nautilus Reef is a prime location for divers in the United States.
Discover the enchantment of Nautilus Reef and create unforgettable memories as you immerse yourself in the wonders of this dive site.
Explore the vibrant underwater world of Nautilus Reef, teeming with a plethora of fish species, including triggerfish, butterflyfish, the stunning Moorish idols, and abundant urchins. If you're lucky, you may even encounter the majestic white tip reef shark seeking solace within the overhangs.
Enhance your diving experience with excellent visibility of up to 14m, allowing you to revel in the beauty of this underwater paradise. Situated near Kewalo Marine Laboratory in the captivating Kaka‘ako Waterfront area of Honolulu, Hawaii, Nautilus Reef is a prime location for divers in the United States.
Discover the enchantment of Nautilus Reef and create unforgettable memories as you immerse yourself in the wonders of this dive site.
Diving Conditions Score for Nautilus Reef
8
Very GoodVery good diving conditions!
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Nautilus Reef
Depth
13m
Visibility
14m
Experience Level
beginner
Weather Conditions for Nautilus Reef
Wave Height
1.14m
Wind Speed
14.3 m/s
Water Temp
27°C
Visibility
50.02km
Cloud Cover
17%
Wave Period
12.15s
Air Temperature
25.1°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Nautilus Reef
Alpha
Dive Score Chart for Nautilus Reef
Best time to dive: 16:00 with score 8.078791836734695/10. Water conditions: Waves 1.14m, Wind 8.1 m/s.Best night dive time: 1:00 with score 8.233466666666667/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Nautilus Reef: 06:00
Sunset at Nautilus Reef: 18:00
Optimal diving conditions at Nautilus Reef 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
1:00Score: 8.2/10
Waves: 1.14m (12s), Wind: 2.5 m/s
Safest Overall
16:00Score: 8.1/10
Waves: 1.14m (12.25s), Wind: 8.1 m/s
Best Day
16:00Score: 8.1/10
Waves: 1.14m, Wind: 8.1 m/s
Seasonal Analysis for Nautilus ReefAlpha
Historical patterns and best seasons for diving at Nautilus Reef
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 Nautilus Reef
Winter
Avg. Score: 9.4/10
Winter offers the best overall diving conditions with calmer seas and better visibility, despite cooler temperatures.
Best Months for Nautilus Reef
January
Score: 9.6
February
Score: 9.4
March
Score: 9.1
Ideal Conditions for Nautilus Reef
Water Temp
25.7°C / 78.3°F
June
Visibility
15.0m / 49.2ft
January
Wave Height
1.0m / 3.3ft
January
Wave Period
8.0s
January
Seasonal Insights for Nautilus Reef
Nautilus Reef shows typical northern hemisphere patterns with June being the warmest month (25.7°C) and January the coldest (19.0°C). The calmest conditions typically occur in January with average wave heights of 1.0m 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 0.1mm 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.
Last updated: 4 hr. 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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