San Marcos, CA vs Seaside, CA

San Marcos, CA and Seaside, CA have a very similar cost of living, with only a 2.2% difference in their overall index. San Marcos scores 170 while Seaside scores 167 on the cost of living index, where 100 represents the national average. The day-to-day expenses for residents in both cities are comparable, though differences emerge when looking at specific categories.

On the housing front, median rent in San Marcos is $2,191/month compared to $2,314/month in Seaside — a 5% difference. Interestingly, home values tell a different story: while San Marcos has cheaper rent, Seaside actually has lower median home values ($692,600 vs $792,400).

Median household income in San Marcos is $105,286 compared to $82,303 in Seaside (+27.9%). While San Marcos is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of San Marcos spend roughly 25% of their income on rent, less than the 33.7% in Seaside. The San Marcos ratio exceeds the commonly recommended 30% threshold, which can put pressure on household budgets.

Climate-wise, San Marcos is notably warmer with an average of 62.5°F compared to 57.3°F in Seaside. Seaside receives more rainfall at 16.2" per year compared to 11.4" in San Marcos.