The Pacific is not a place you drift into. You plan it for months, study the weather patterns, provision for three weeks of self-sufficiency, and then one morning you pull up the anchor or cast off the dock lines in San Francisco Bay or San Diego and point the bow southwest into a very large amount of water. The first few days are familiar — the California coast, coastwise shipping, the Channel Islands if you go that way. Then the coast fades and the ocean becomes the entire world for two to three weeks. Most sailors who've done it describe it the same way afterward: the passage itself was fine, often better than they expected, and nothing they read quite prepared them for the psychological reality of that much open water.
The North Pacific High: The Fact That Organizes Everything
The North Pacific High is a semi-permanent area of high pressure that sits in the central North Pacific, typically centered around 35–40°N and shifting seasonally. In summer, when it's well-established and relatively stable, it generates consistent northwesterly winds along the US West Coast and trades the southwest flow into the tropics. In spring, before it builds to its full summer position, the center is further south and east, and the winds are less predictable. In fall, as it weakens and retreats, the window for a safe westbound crossing narrows rapidly.
The standard departure window for the California-to-Hawaii passage is May through July, with May and early June generally preferred. By then the High is established enough to give you northwesterlies off the California coast — a beam or broad reach for the first several hundred miles — before the route curves south into the Northeast Trades that carry you the rest of the way to Oahu or the Big Island. Leave too early (March, April) and you're fighting unsettled conditions with a higher chance of headwinds. Leave in September and you're either cutting the season very tight or looking at hurricane season in Hawaii, which peaks August through October.
California to Hawaii: The Rhumb Line vs. the Routing
The rhumb line from San Francisco to Honolulu is approximately 2,090 miles and runs roughly southwest. The great circle route, in these latitudes and at this heading, is nearly the same distance. Neither is likely to be your optimal track.
The correct routing depends entirely on where the North Pacific High is positioned when you leave. A high centered further northeast pushes you south to find the trades sooner. A high centered further northwest allows a more direct track. This is why weather routing services — there are several that specialize in Pacific passages — are worth consulting before departure. The difference between a routing that gets you into the trades quickly and one that leaves you motorsailing through light air for the first 600 miles is measured in days of passage time and a meaningful amount of fuel.
Bay Area versus San Diego as a departure port is genuinely a tradeoff. San Diego saves you roughly 450 miles to Hawaii (the rhumb line is about 2,230 miles vs. 2,090 from San Francisco, but the Bay Area adds another hundred miles of bay transit and the Golden Gate). More importantly, Bay Area departures can get more wind in the first days off the coast; San Diego is further south and closer to the trades, but the first 500 miles often involve light air and motorsailing regardless. Many experienced Pacific sailors depart from wherever their boat is berthed and don't agonize about the departure port — the ocean is big enough that 400 miles of starting point difference gets absorbed into the passage itself.
Hawaii to the Marquesas: The Trade Wind Run
The leg from Hawaii to the Marquesas — approximately 2,100 miles from Hilo on the Big Island to Nuku Hiva, or closer to 2,800 from Oahu — is in many ways easier than the California-Hawaii leg, despite being longer. Once you're south of about 10°N, you're in steady Northeast Trades: consistent 15–20 knot winds from roughly 070–090°, seas 6–10 feet from the same direction, blue water, reasonable temperatures. The boat is on a consistent broad reach or run day after day. You fall into a watch routine and the miles accumulate steadily.
The challenge is running dead downwind for weeks at a time. Many boats rig a whisker pole or spinnaker pole to keep the headsail drawing when running by the lee, and alternate broad reaches to reduce the risk of an accidental gybe. Autopilot wear is a real issue on long downwind passages — the constant small corrections in following seas work the steering system harder than close-hauled sailing does. Check your autopilot ram and drive unit before this passage and carry the belts and hydraulic fluid to service it at sea.
The rhumb line from Hilo runs nearly due south and then southeast, taking you across the equatorial calms (the ITCZ, or doldrums) somewhere around 8–10°N. The ITCZ in the central Pacific is often narrower and less dramatic than in the Atlantic, but it exists: expect a day or two of variable winds, possible squalls, and motoring. Once through it, the Southeast Trades pick up and the last 600 miles to the Marquesas are typically fast.
Provisioning for Three Weeks Offshore
The standard advice is to provision for your expected passage time plus 50 percent. If you expect 18 days, stock 27 days. Passages go long when they go wrong, and a boat that runs out of food 500 miles from any port has created a problem that could have been avoided with an extra case of canned goods and a proper spares inventory.
The practical provisioning list for three weeks offshore in warm weather: canned and dried proteins (tuna, beans, lentils, chicken), rice, pasta, instant mashed potato, crackers, peanut butter, long-life dairy (UHT milk, powdered), dried fruit, nuts, and whatever fresh produce you can work through in the first week. Eggs, stored unwashed and turned occasionally, last two to three weeks without refrigeration in tropical temperatures. Bread goes moldy quickly in humidity; tortillas and crackers are more practical.
Fishing supplements the provision list on Pacific passages in a way that Atlantic passages often don't. Mahi-mahi aggregate around floating weed lines and debris in the open Pacific. A simple trolling setup — a cedar plug or plastic squid rigged on 50-lb mono behind the boat — will catch fish on most Pacific passages. The mahi at the weed lines are plentiful, fight well enough to be entertaining, and taste excellent. Tuna, especially skipjack and yellowfin, are common in the trades. A good hand line or a light trolling rod and reel, a few lures, and the knowledge to clean and prepare fish quickly overboard are worthwhile additions to any Pacific crossing kit.
The Marquesas: Nuku Hiva and Hiva Oa
Nuku Hiva is the main clearance port for French Polynesia. The Port of Taiohae on the south coast is a well-protected anchorage with a fuel dock, a small chandlery, reasonable provisioning from the local market and a couple of small supermarkets, and the French administrative offices where you complete entry formalities. The anchorage itself can be rolly in a northeast swell; if the swell is up, the north side of the bay closer to the valley is somewhat more protected.
Hiva Oa, the second-largest island in the Marquesas group, draws visitors partly because both Paul Gauguin and Jacques Brel chose it as their final home. Gauguin is buried in the small cemetery above Atuona; Brel's grave is nearby. The island's museum has excellent reproduction panels of Gauguin's work with context about his time in French Polynesia. Provisioning is more limited here than on Nuku Hiva, and the anchorage at Atuona requires careful entry through a narrow channel, but the island is worth the effort if you have time before pushing on to the Society Islands.
The Return: Why Nobody Sails Back the Same Way
Sailing from Hawaii back to California means sailing directly into the Northeast Trades and then the prevailing westerlies — essentially heading upwind for 2,000 miles, which is a miserable prospect on a passagemaking boat even if it's technically possible. Almost nobody does it. The standard return from the Pacific is to continue west: Society Islands, Tonga, Fiji, and eventually Australia or back north through Micronesia — a de facto circumnavigation once you've committed to crossing the Pacific eastbound. Alternatively, boats ship home from Australia or New Zealand: the boat goes on a freight carrier, crew flies back. The cost of shipping is significant but manageable, and it avoids the Southern Ocean on the return routing.
The decision to cross the Pacific should be made with the understanding that it's more likely a one-way passage than a round trip. That's not a problem — it's simply the nature of a trade-wind ocean. The Pacific blows west; you go west with it.