Tanjung Aan in January

Walk down to the sand in mid-January and the first thing you notice is the seaweed line. A continuous band of brown-green seaweed, sometimes a metre wide and ankle-deep, runs the length of both the white-sand and pepper-sand beaches. The wash-up arrives on every high tide and sits, fermenting in the heat. Local seaweed harvesters do collect some of it — there's a small commercial harvest in the area — but they can't keep up with the wet-season volume.

The water itself is murky. Runoff from the hills behind Tanjung Aan stains the bay brown for days after heavy rain, and visibility drops to under a metre in the shallows. Onshore wind kicks up a confused swell that makes swimming uncomfortable rather than dangerous.

January averages 380mm of rain across roughly 24 days. That's the wettest month of the Lombok year. Rain doesn't fall constantly — typical pattern is overnight downpours, mid-morning clearing, then heavy afternoon thunderstorms building through the day. You can sometimes string together a dry morning, but planning a full beach day is unrealistic.

Temperatures stay warm: highs around 30°C, lows 24°C. Humidity sits near 88% which makes everything feel sticky and slow to dry. Cloud cover is heavy enough that you won't sunburn easily, but you also won't get the bright turquoise water that draws people here.

Possible: Driving out from Kuta for a quick look (20 minutes by scooter when roads aren't flooded), photographing the dramatic skies, climbing Merese Hill on a rare clear afternoon, eating at one of the warungs that stay open year-round.

Not really possible: Swimming comfortably, surfing the Tanjung Aan reef break (it works on the right swell but the wet-season chop and weed make it grim), snorkeling, sunbathing on clean white sand, or assembling the Instagram shot you came for.

Tanjung Aan in January is essentially empty. You might see five other foreigners across the entire crescent on a weekday. Domestic Indonesian visitors mostly avoid south Lombok during the wet season too. The vendors who do show up are bored and prices are negotiable — you can have a fresh coconut and a bench in the shade for almost nothing.

The upside of empty: zero hassle from beach sellers, no parking fight, and Merese Hill all to yourself if the weather lets you climb it. The downside: many warungs are simply shuttered, and you can't rely on amenities being open.

A few things worth knowing if you visit anyway:

• The east end of Tanjung Aan (the pepper-sand beach) tends to accumulate even more seaweed than the white-sand western end because of how the bay's currents work. Stick to the western half if you want the cleanest sand on offer.
• The access road from Kuta floods at two low points after heavy rain. A scooter usually gets through; a low-clearance car sometimes can't. Check with your accommodation in the morning before driving out.
• Merese Hill is slippery in January. The path up is clay and turns to grease after rain. Wear shoes with grip; don't attempt it in flip-flops.
• The "Tanjung Aan Resort" construction site visible from parts of the beach is a long-running project — don't be surprised by hardhats and earthworks in the background of your shots.
• If you're hoping for the famous sunset, you'll be disappointed almost every January evening. The cloud line on the western horizon kills the colour. Sunrise is more reliable on calmer mornings.

If Tanjung Aan is the reason you're picking south Lombok, push your trip to between May and September. May gives you a clean beach without the August crowd. July through September is peak — clear water, perfect crescent, busy on weekends but still manageable on weekdays. October stays good before the rain returns in November.

January only makes sense if you're already in the area for other reasons, want a moody photo set, or specifically enjoy empty beaches over swimmable ones.