Edna’s Anchor
This dive site explores the captivating sand/reef edge leading to an exhilarating drop off. The underwater landscape slopes gradually like a ski slope, starting at about 22 meters and reaching a maximum depth of 65 meters. Nestled between two coral bommies at 24 meters lies the impressive anchor of the historic schooner Edna, which met its watery fate in Atiu.
Divers can expect a diverse array of marine life, including parrotfish, scorpionfish, lionfish, turtles, crocodile needlefish, peacock groupers, damselfish, Christmas tree worms, pineapple sea cucumbers, and magnificent porites corals.
Located near Michigan Motors, Ara Tapu, Pue, Avarua, Te-Au-O-Tonga, Rarotonga, Cook Islands, this dive site offers a visibility of 28 meters, making it a top choice for divers of all levels, from beginners to advanced experts. Prepare to be amazed by the underwater wonders that await in the pristine waters of the Cook Islands.
Divers can expect a diverse array of marine life, including parrotfish, scorpionfish, lionfish, turtles, crocodile needlefish, peacock groupers, damselfish, Christmas tree worms, pineapple sea cucumbers, and magnificent porites corals.
Located near Michigan Motors, Ara Tapu, Pue, Avarua, Te-Au-O-Tonga, Rarotonga, Cook Islands, this dive site offers a visibility of 28 meters, making it a top choice for divers of all levels, from beginners to advanced experts. Prepare to be amazed by the underwater wonders that await in the pristine waters of the Cook Islands.
Diving Conditions Score for Edna’s Anchor
6.6
Above AverageDecent conditions, proceed with caution.
The score is based on a calculation of the current weather and sea conditions.
Dive Site Overview for Edna’s Anchor
Depth
20m
Visibility
28m
Experience Level
beginner
advanced
expert
Weather Conditions for Edna’s Anchor
Wave Height
1.74m
Wind Speed
16.4 m/s
Water Temp
24.3°C
Visibility
48.42km
Cloud Cover
100%
Wave Period
10.5s
Air Temperature
21°C
Precipitation
0 mm
Detailed 7-Day Diving Forecast for Edna’s Anchor
Alpha
Dive Score Chart for Edna’s Anchor
Best time to dive: 17:00 with score 6.332633333333334/10. Water conditions: Waves 1.7m, Wind 18 m/s.Best night dive time: 20:00 with score 5.886204761904762/10.
Chart showing hourly dive conditions including wave height, wind speed, water temperature, and visibility throughout the day.
Sunrise at Edna’s Anchor: 06:00
Sunset at Edna’s Anchor: 18:00
Optimal diving conditions at Edna’s Anchor 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
17:00Score: 6.3/10
Waves: 1.7m (10.8s), Wind: 18 m/s
Safest Overall
16:00Score: 6.3/10
Waves: 1.7m (10.7s), Wind: 17.5 m/s
Best Night
20:00Score: 5.9/10
Waves: 1.66m, Wind: 19 m/s
Seasonal Analysis for Edna’s AnchorAlpha
Historical patterns and best seasons for diving at Edna’s Anchor
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 Edna’s Anchor
Summer
Avg. Score: 9.3/10
Summer offers the warmest water temperatures and generally favorable conditions for all levels of divers.
Best Months for Edna’s Anchor
June
Score: 9.5
July
Score: 9.4
May
Score: 9.2
Ideal Conditions for Edna’s Anchor
Water Temp
25.4°C / 77.7°F
May
Visibility
11.7m / 38.4ft
July
Wave Height
2.1m / 6.9ft
March
Wave Period
8.0s
January
Seasonal Insights for Edna’s Anchor
Edna’s Anchor follows southern hemisphere patterns with May being the warmest month (25.4°C) and November the coldest (19.7°C). The calmest conditions typically occur in March with average wave heights of 2.1m and wave periods of 8.0s. The most comfortable wave conditions are in March 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). July is usually the driest month with 0.3mm of precipitation. For beginners, the best time to visit would be during March to May, 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: 1 min. ago - Jul 8, 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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