マートルビーチの月別の天気
マートルビーチを訪れるベストシーズンは5月、6月、9月です — 5月は87/100、最高26°C、雨の日8日。 ベストな季節は夏(6月〜8月)で、平均81/100です。
最も不向きな月は12月で、58/100です — 涼しい、雨が多い、空気がきれい。 12月を見る →
2026年9月更新 · ERA5再解析による気候平年値
周辺も含めて旅を計画するなら アメリカ合衆国旅行のベストシーズン →
マートルビーチMyrtle Beach, United States🇺🇸 アメリカ合衆国 · 米国南部 · ビーチ87
ベストな季節:6月〜8月(平均81/100) · 最も不向きなのは12月(58/100)
- 日中
- 26°C
- 夜
- 18°C
- 雨の日
- 8
- 日照
- 10.8 h
- 湿度
- 75%
- 日の長さ
- 14 h

マートルビーチの月ごとのようす
マートルビーチに最も合う旅のタイプでの100点満点の快適スコア、気候平年値による平均最高気温・雨の日数・1日の日照時間、そして混雑具合の目安です。
マートルビーチの年間イベント
祭り、自然の見どころ、祝日、そして注意したい季節 — 厳選し出典を明記しています。詳しくは各月のページで。
- 2月
- Myrtle Beach Marathon2月25日〜3月12日(例年)祭り
- 3月
- Can-Am Days3月10日〜25日(例年)祭り
- 5月
- Spring Bike Week5月8日〜17日祭り
- Loggerhead nesting5月1日〜10月31日自然
- Memorial Day weekend5月23日〜25日祝日
- 6月
- Carolina Country Music Fest6月4日〜7日祭り
- Atlantic hurricane season6月1日〜11月30日要注意
- Sea warm enough6月1日〜10月5日(例年)季節
- School-holiday season6月5日〜8月20日季節
- 7月
- Independence Day7月3日〜5日祝日
- 8月
- Labor Day weekend9月5日〜7日祝日
- 12月
- Nights of a Thousand Candles12月3日〜31日祭り
- Snowbird season12月1日〜2月28日(例年)季節
5月のマートルビーチの混雑
その場所自体の混み具合 — 学校休暇や大型連休、編集部がタグ付けした月、そして天気の良さによる人気の高さ。快適スコアには含まれません。
ピークの混雑Spring Bike Week、Memorial Day weekend(推定)
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ピークの混雑混雑ショルダーシーズン閑散
マートルビーチの旅行者の声
実際に訪れた人たちの声です — 通年のメモを先に、そのあと月ごとに並べています。
Myrtle Beach-forum threads on January weather describe genuinely variable conditions - typical days sitting in the 50s Fahrenheit, but posters note it's entirely possible to catch a run of 70-degree afternoons on the warmest stretches, right alongside a cold snap on other days. Mornings run chilly regardless, but the afternoon warmth is often enough for a comfortable beach walk, outdoor dining, or a round of golf with just a light jacket. The ocean itself is called firmly off-limits for swimming, water temperatures cold enough that even wading isn't appealing. Regulars are consistent that the real trade-off this month isn't the weather but the town itself - a genuine share of restaurants and attractions close for the off-season, so the notably cheaper rates come paired with fewer open options compared to summer. The record: 13.7C days feeling like 12C, 4C nights, 82mm across 8.1 days, 2.4cm of rare snowfall, a 10.9C sea, 72 percent humidity and 7.2 hours of sun.
Regulars put the average air near 76F with water around 68F, both still on the cool side, and warn the month can swing day to day - 75 one afternoon, 55 the next. Our row backs that unsettled read, 22.5C reading as 22C over 12.9C nights, with 87.4mm of rain across 6.6 days and a genuine 20.2 kph wind. The sea sits at 19.5C, manageable for some by late April rather than truly warm, which is why regulars traveling with kids over spring break are pointed toward a hotel with a heated indoor pool as the reliable backup regardless of what the ocean is doing that day. Days are usually clear and sunny even when the water lags behind. The record: humidity 70 percent, 10.7 hours of sun and AQI 51.
Myrtle Beach's forum calls May a favorite — warm without being oppressive, average highs in the low 80s°F, good for spending the day outside. Regulars note the ocean itself stays on the cool side through most of the month, warming up enough for comfortable swimming right around Memorial Day, and that evening breezes off the water can be genuinely refreshing enough for a light jacket.
Asked to choose between June and July, the Myrtle Beach forum comes down on early June: warm without being the full summer, restaurants manageable, rates noticeably better, and nothing like the 4th-of-July fortnight, which regulars call the most crowded stretch of the year. Their averages for the month are highs near 88F, lows near 67F, and water about 77F - swimmable in early June but not yet the bath it becomes in July. Thunderstorms exist but are less of a fixture than later in summer, tend to build inland rather than over the beach, and pass in an hour when they do arrive. The record: 29.3C days that feel like 34C, 21.8C nights, 9.5 precipitation days carrying 136.4mm, 11.6 hours of sun and a 25.2C sea.
September is the month locals name alongside May: about 85F air and 77F water on their figures - our row says 28.5C and a 27.2C sea - with the crowds gone the moment Labor Day passes, no queues at the restaurants or the mini-golf, and accommodation prices down with them. The caveat is the calendar it shares with hurricane season, of which September is the peak. Regulars are measured about it: storms more often skirt the South Carolina coast for North Carolina, and one of them counts nine September trips with a single tropical storm that was not severe. Our row's 210mm across 8 precipitation days is the wettest total in this round, and that is what a tropical system looks like in a monthly normal. The record: 20.8C nights, humidity 79 percent and 9.8 hours of sun.
Regulars are specific this month is a real transition, highs falling from near 80F early on to around 70F by the end, with the ocean itself cooling noticeably faster after the second week - early October named as the better window for anyone actually planning to swim. Our row backs that mild, still-pleasant read, 24.6C over 15.3C nights, with 110.9mm of rain across 6.1 days and humidity at 74 percent. Regulars are consistent this counts as genuinely perfect weather for strolling the beach even once swimsuit weather fades, crowds thinning fast and hotel deals improving as the month goes on. The sea sits at 21.8C, still comfortable for many earlier in the month. The record: 8.9 hours of sun, a 17 kph wind and AQI 42.
Forum posters describe November as genuinely swingy - a 70sF day can be followed by one in the 50s, with mornings commonly cool to outright cold (30s-40sF) before climbing into the 50s-70sF range by midday. Ocean water has cooled enough by this point that it's really just a toe-dip rather than real swimming, though walking the beach itself stays perfectly pleasant. The clear upside of visiting off-season: nearly everything stays open (some on shorter hours), with noticeably less traffic, little-to-no restaurant wait, and coupon deals that don't show up in summer. Posters recommend Brookgreen Gardens, Barefoot Landing, Broadway at the Beach and the Carolina Opry as solid November activities, plus mini-golf and the SkyWheel, which stay open year-round regardless of the water temperature.
地図のマートルビーチのカードから自分のメモを追加できます。