San Felipe is a desert town on the Sea of Cortez. That combination drives everything about when you should come and when you should stay home. Summers are brutally hot. Winters are mild and quiet. The water temperature swings 25 degrees between February and August. If you pick the right window, this place is paradise. Pick the wrong week and you will remember it for the wrong reasons.
High season runs roughly November through April. That is when snowbirds fill the RV parks, restaurants stay busy, and rental rates climb. Low season is June through September, when locals joke that even the dogs are hiding in the shade. The shoulder months on either side are often the best of both worlds.
There is one week every year that even people who live here actively avoid: Semana Santa. Holy Week, the week leading into Easter, pulls tens of thousands of partiers out of Mexicali and into San Felipe's beaches. If you do not know about it and you book then by accident, it will color your whole impression of the town. More on that below.
The Short Answer
Two sweet spots. Late October through mid-December is our favorite: daytime highs in the 75-85 range, water still swimmable around 72-75 degrees F, and most of the snowbirds have not arrived yet. Mid-March through early May is the second window, once Semana Santa is done. Days are longer, the desert blooms, and the water is warming back up.
Skip July through early September unless you have AC dialed and a tolerance for 100-115 degree afternoons with humidity. And skip the 8-10 days around Semana Santa (usually late March or early April) unless you specifically want the party.
Month by Month Breakdown
January
Highs 70-75, lows 50-55. Water around 62 degrees and too cold for most swimmers. Quietest month of the year alongside February. RV parks are 40-50% full. This is the month for hiking, long walks on the malecon, and desert drives without the heat. Wind can be sharp on the beach in the mornings, so bring a layer.
February
Highs 70-78, lows 52-58. Water hits its annual low around 60-62 degrees. Still quiet, still cool. Whale watching trips out of Puertecitos occasionally run this month. You will see more snowbirds arriving from Canada. Restaurants are open but slower, and reservations are never needed.
March
Highs 75-82, lows 55-62. Water creeping back up to 65 degrees by month end. The first big shift of the year: snowbirds peak, restaurants fill, and prices tick up. The Baja 250 off-road race usually runs in early March and brings race fans and spectators to the desert outside town. Great month overall, but watch for Semana Santa if Easter falls early.
April
Highs 80-88, lows 60-65. Water around 68-70 degrees and comfortable for a quick dip. This is usually when Semana Santa lands, so the first half of the month is packed and loud, and the second half goes back to normal. Late April is honestly one of the best windows all year: warm, long days, and the crowds have thinned.
May
Highs 88-95, lows 65-72. Water at 72-76 degrees and legitimately swimmable. Snowbirds start heading home. Fishing season is in full swing for yellowtail and corvina. The Baja 500 race weekend is usually late May or early June. Good month, especially the first half before the heat really stacks up.
June
Highs 95-103, lows 72-78. Water 78-82 degrees. The town empties out fast. By mid-June you are down to locals, a few hardcore fishermen, and budget travelers. Afternoons are hot enough that you will plan your day around shade and the water. Mornings and evenings on the beach are still beautiful.
July
Highs 100-110, lows 78-85. Water at 82-86 degrees, almost too warm to be refreshing. Humidity creeps up and the occasional summer storm rolls through from the mainland. Low season pricing is in full effect, and rentals that sit empty in the summer months get discounted hard. If you have a beachfront place with solid AC, you can make this work by being on the water before 9 AM and after 6 PM. If you are planning to be outside in the afternoon, do not. The fourth of July weekend pulls in a small group of American visitors, but it is nothing like March or April.
August
Highs 102-115, lows 80-88. Water peaks around 85-88 degrees. Hottest month of the year, and the humidity makes it feel worse. Summer storm season, so you might see dramatic lightning out over the Sea of Cortez. Power bills spike for anyone running AC around the clock. Not a vacation month. Locals who can leave, leave.
September
Highs 95-105, lows 75-82. Water still 82-84 degrees. Shrimp season opens mid-September and the boats start coming back with fresh catches. Heat is still serious but tapering. Early September is still brutal. By the last week you can feel the shift. Hurricane remnants occasionally brush the area, though they almost always weaken to rain by the time they reach here.
October
Highs 85-92, lows 65-72. Water at 78-80 degrees. This is where it starts getting good. First half of the month can still feel like late summer, but by mid-October the evenings are crisp and you can actually walk the beach at 3 PM. Low crowds, reasonable prices, and some of the best swimming conditions of the year. One of our top picks.
November
Highs 75-82, lows 58-65. Water at 72-76 degrees. The best single month in our opinion. Day of the Dead celebrations happen in the first week, and local families set up altars and gather in the plaza. Snowbirds are trickling in but it is not packed yet. Fishing is solid, nights are cool, and you can sit on a patio at dinner without needing AC or a heater.
December
Highs 70-78, lows 50-60. Water cooling fast, from around 68 early in the month to roughly 63 by New Year. Local holiday light displays go up around mid-month, and the plaza gets festive. Christmas and New Year's weeks see a small bump in family visitors from the U.S. side. Swimmers will want a wetsuit by late December, but everyone else is happy in long sleeves on the beach.
Water Temperature by Season
Most first-time visitors are surprised how cold the Sea of Cortez gets in winter. It is the desert, and people assume the water matches the tropical reputation. It does not. January and February water is genuinely too cold for casual swimming without a wetsuit.
Rough water temperatures by month, in degrees F:
Jul: 84 | Aug: 86 | Sep: 83 | Oct: 79 | Nov: 75 | Dec: 68
If you are coming specifically to swim or snorkel, aim for May through October. If you are coming for everything else (fishing, hiking, ATV, walking the beach, eating shrimp tacos), the cooler months are better because you can be active outdoors all day.
Semana Santa: The Week to Avoid
Semana Santa is Holy Week, the week leading into Easter Sunday. In most of Mexico it is a family holiday. In San Felipe it is a party. Mexicali sits two hours north, and when the schools and offices close for the week, tens of thousands of young people drive south to the closest beach. That closest beach is here.
During Semana Santa the beach fills with music, vendors, coolers, trucks on the sand, and a crowd that 50,000+ strong at peak days. Rental prices double or triple. Restaurants run out of food. Highway 5 gets backed up, and a drive that usually takes 2 hours from Mexicali can stretch to 4 or 5. If you were picturing a quiet beach getaway, this is the exact opposite.
Before you book anything in March or April, Google "Easter Sunday" for the year you are traveling. Then avoid the 7 days before Easter and the weekend immediately after. That 10-day buffer will save your trip. If you are curious about the party specifically, come see it once, but do not expect the town you hear about the rest of the year.
Second-tier busy weekends to know about: Memorial Day weekend brings a wave of U.S. visitors making the drive down from San Diego, and Labor Day weekend does the same on a smaller scale. Neither of those compares to Semana Santa, but rentals fill up and prices bump for a few days.
High Season vs Low Season Prices
Rental nightly rates swing hard by season. A beachfront casita that goes for $90-110 per night in July runs $150-180 per night in February. Roughly 50-80% more for high season across the board. Weekly and monthly rates stretch further but still move with demand. Semana Santa is its own pricing tier, often double the normal high-season rate.
The rest of your spending does not shift much. Gas is gas. A fish taco is about 40 pesos in January or July. ATV rentals hold steady at $60-80 for a half day. Groceries, beer, and local restaurants do not change their prices for tourists. So if you are budget-conscious, the savings are almost entirely in where you sleep.
One practical note on booking: if you are targeting high season, book 2-3 months out for the good beachfront spots. In low season you can usually walk in and find something the same day. Shoulder months like late October and late April sit in between, and a few weeks of lead time is enough.
Events Worth Timing Your Trip Around
A handful of events each year are worth planning around if one of them lines up with your window:
- Baja 250 (early March): Off-road race that brings spectators and trucks to the desert. Cool to watch if you are into it. Busier than usual but nothing like Semana Santa.
- Baja 500 (late May or early June): Bigger version of the 250. Same deal. Book early if you want to be here.
- Shrimp season opener (mid-September): The first fresh catches come in and every seafood restaurant in town has specials. Best shrimp you will eat all year.
- Day of the Dead (November 1-2): Local families decorate altars in the plaza and along the malecon. Quieter and more traditional than what you see in bigger cities, but genuinely beautiful.
- Holiday light displays (mid-December through early January): The plaza and malecon light up. Not Vegas, but charming. Families come out in the evenings.
Our Call
Late October through mid-December is the single best window to visit San Felipe. Water is still warm enough to swim through early November, days are perfect, nights are cool, and the town has that easy rhythm before the full snowbird wave arrives. If you can only pick one stretch and you want to experience this place at its best, pick that one.
Second choice: late March through early May, once Semana Santa has cleared out. Longer days, warmer water, and the desert is alive. You will have more company in town, but the tradeoff is weather you cannot beat.
If you are thinking about making the trip and want to see La Hacienda in person while you are down, check the getting here guide or reach out and we will meet you when you arrive. Either way, pick your week carefully. The difference between the right week in San Felipe and the wrong one is bigger than most places.