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NauticalNickVisibility Report

Two Harbors

Two Harbors · Catalina Island · California

Entry type
Shore + boat
Spearfishing
Legal
Difficulty
Beginner
Popular activities
Swim · Snorkel · Scuba

Today's forecast

Updated 6:00 AM PT today
Predicted visibility
14
ftRange 1216
Good
High confidence
0510152030+ ft
Time of day
How it shifts today
17 ft
6 AM
Best
14 ft
10 AM
Now
11 ft
1 PM
Worst

Dawn is the clearest window. A late-morning onshore builds surface chop and gives up a few feet by the afternoon.

What influences the visibility?
Contributing factors
Chlorophyll
1.4 mg/m³
Average · Neutral for vis
Swell
2–3 ft @ 12s
Average · Neutral for vis
Wind
7 mph W
Low · Neutral for vis
Water temp
63 °F
Average · Neutral for vis
Last rain
10 days ago · 0.2 in
Distant · Good for vis
Ocean Oracle

7-Day Forecast

Forecasts beyond today are Pro-only
Today · Sat
May 30
14 ft
Good
Dawn is the clearest window.
Sun
May 31
17
Excellent
Onshore returns by midday.
Mon
Jun 1
12
Good
Swell eases overnight.
Tue
Jun 2
11
Good
Weekend wind on the inside.
Wed
Jun 3
19
Excellent
Short-period wind swell.
Thu
Jun 4
14
Good
Light offshore; clearer.
Fri
Jun 5
12
Good
Mixed surf, fair window.
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Map · getting there

33.443° N · 118.499° W
Map of Two Harbors at the Isthmus of Catalina Island
Static map
Address
Two Harbors
Catalina Island, CA 90704
33.4427° N, 118.4985° W
Field notes

About Two Harbors

Two Harbors is the other town on Catalina, a small village at the Isthmus on the west end of the island where the land narrows to about half a mile between Isthmus Cove on the front side and Cat Harbor on the back side. The year-round population is around 200. The village has one general store, the Harbor Reef restaurant, a dive shop, a campground, a small kayak rental, and a sailboat anchorage. Everything closes early. The Catalina Express runs a separate ferry line from San Pedro, the Safari Bus crosses the island from Avalon, and most Catalina locals reach the village by private boat.

Harbor Sands is the small white-sand swimming beach off the Isthmus Pier, where families and waders spend the day. Snorkeling inside the cove itself is poor, and most of the diving activity on this side of the island happens at the nearby offshore sites. Bird Rock, Blue Cavern Point, Eagle Reef, Sea Fan Grotto, and Ship Rock all sit within a short boat ride of the cove, and dive shops in Avalon and San Pedro run half-day charters to them with scuba gear. Visibility at these offshore sites tends to run cleaner than inside the cove because they are further from the harbor runoff.

Dense giant kelp grows along the edges of both harbors, which is a kelp forest biome. Isthmus Cove and Cat Harbor are both partially enclosed protected anchorages with the calm water and harbor character of a bay biome.

There are no roads in. Access is by Catalina Express ferry from San Pedro, by Safari Bus from Avalon, or by private boat. Once on the ground, the village is fully walkable. Fishing and spearfishing are legal under standard California regulations. The surrounding MPAs are close: Blue Cavern Onshore SMCA wraps the headland just east of Isthmus Cove and is no-take, and Arrow Point to Lion Head Point SMCA sits to the west. Position should be verified with a chartplotter before harvesting near the village.

Kelp Forest biome illustration
Biome illustration
Biome

Kelp Forest

The kelp forest biome is giant kelp anchored to rocky bottom and growing up through the water column. The canopy and stipes form a three-dimensional habitat that shelters fish, invertebrates, and the predators that hunt them. Learn more about this biome and the species found in it by clicking the link below.

Learn more in the Biome Glossary
Bay biome illustration
Sub-biome illustration
Sub-biome

Bay

The bay biome is sheltered, low-energy water behind a jetty, headland, or harbor mouth. Reduced wave action lets fine sediment settle out and supports calm-water species and the juveniles that shelter there. Learn more about this biome and the species found in it by clicking the link below.

Learn more in the Biome Glossary
For spearos · for hookline

Target Fish Species

Ocean Oracle Pro
Kelp (Calico) Bass
Year-round · kelp + reef
California Sheephead
Year-round · rocky reef
Barred Sand Bass
Summer · sand-reef edge
Ocean Whitefish
Year-round · deeper reef
California Spiny Lobster
Oct–Mar · reef crevices
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Water temp, air temp, wind, swell, chlorophyll. Every metric behind the visibility score, exposed for the deep-data divers.

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Two Harbors — Visibility Forecast | Nautical Nick